3. VERA

VERA系列基准题是美国国家橡树岭实验室为验证CASL计划中开发的程序所设计的一系列非常完备的基准题， 它是以西屋公司设计的17×17压水堆Watts Bar为模型，涵盖从二维单栅元到三维全堆芯、多物理耦合及时间依赖的十类基准问题。

相关参考文献如下:

1. Godfrey, A.T., 2014. VERA core physics benchmark progression problem specifications. Oak Ridge National Laboratory, Oak Ridge, TN, Report No. CASL-U-2012-0131-004. https://www.casl.gov/sites/default/files/docs/CASL-U-2012-0131-004.pdf.

两维单栅元问题：

1. VERA_1A

2. VERA_1B

3. VERA_1C

4. VERA_1D

5. VERA_1E

两维单组件问题：

1. VERA_2A

2. VERA_2B

3. VERA_2C

4. VERA_2D

5. VERA_2E

6. VERA_2F

7. VERA_2G

8. VERA_2H

9. VERA_2I

10. VERA_2J

11. VERA_2K

12. VERA_2L

13. VERA_2M

14. VERA_2N

15. VERA_2O

16. VERA_2P

17. VERA_2Q

三维单组件问题：

1. VERA_3A

2. VERA_3B

三维3x3组件问题：

1. VERA_4

两维堆芯问题：

1. VERA_5A_2D

2. VERA_5B_2D

3. VERA_5C_2D

真实堆芯低功率物理实验问题：

1. VERA_5

单组件带热工水力反馈问题：

1. VERA_6

真实堆芯平衡氙带热工水力反馈问题：

1. VERA_7

真实堆芯燃耗跟踪问题：

1. VERA_9

3.1. VERA_1A

materials:
- name: Fuel_31
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: MOD
  elements: [O-nat, H-H2O, B-nat]
  number_densities: [2.48112E-02, 4.96224E-02, 5.38041E-05]

geometries:
  structures:
  - name: Pin
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}

  lattices:
  - name: L31
    cell_map:
      [Pin]

  assemblies:
  - name: A31
    axial: 
    - {slice: L31, height: 1.0}

  core:
    name: VERA_1A
    type: SQUARE
    symmetry: 1
    assembly_pitch: 1.26
    cell_pitch: 1.26
    plane_max_thickness: 10.0
    outer_albedo: 1.0
    assembly_map: 
      [A31]
    top_boundary_condition: REFLECTIVE
    bottom_boundary_condition: REFLECTIVE
 
state:
  system_pressure: 15.516
  moderator_temperature: 565
  fuel_temperature: 565
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.03

to_openmc:
  openmc_settings:
    batches: 2000
    inactive: 500
    particles: 200000

3.2. VERA_1B

materials:
- name: Fuel_31
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: MOD
  elements: [O-nat, H-H2O, B-nat]
  number_densities: [2.20729E-02, 4.41459E-02, 4.786617e-05]

geometries:
  structures:
  - name: Pin
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}

  lattices:
  - name: L31
    cell_map:
      [Pin]

  assemblies:
  - name: A31
    axial: 
    - {slice: L31, height: 1.0}

  core:
    name: VERA_1B
    type: SQUARE
    symmetry: 1
    assembly_pitch: 1.26
    cell_pitch: 1.26
    plane_max_thickness: 10.0
    outer_albedo: 1.0
    assembly_map: 
      [A31]
    top_boundary_condition: REFLECTIVE
    bottom_boundary_condition: REFLECTIVE
 
state:
  system_pressure: 15.516
  moderator_temperature: 600
  fuel_temperature: 600
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.03

to_openmc:
  openmc_settings:
    batches: 2000
    inactive: 500
    particles: 200000

3.3. VERA_1C

materials:
- name: Fuel_31
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: MOD
  elements: [O-nat, H-H2O, B-nat]
  number_densities: [2.20729E-02, 4.41459E-02, 4.786617e-05]

geometries:
  structures:
  - name: Pin
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}

  lattices:
  - name: L31
    cell_map:
      [Pin]

  assemblies:
  - name: A31
    axial: 
    - {slice: L31, height: 1.0}

  core:
    name: VERA_1C
    type: SQUARE
    symmetry: 1
    assembly_pitch: 1.26
    cell_pitch: 1.26
    plane_max_thickness: 10.0
    outer_albedo: 1.0
    assembly_map: 
      [A31]
    top_boundary_condition: REFLECTIVE
    bottom_boundary_condition: REFLECTIVE
 
state:
  system_pressure: 15.516
  moderator_temperature: 600
  fuel_temperature: 900
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.03

to_openmc:
  openmc_settings:
    batches: 2000
    inactive: 500
    particles: 200000

3.4. VERA_1D

materials:
- name: Fuel_31
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: MOD
  elements: [O-nat, H-H2O, B-nat]
  number_densities: [2.20729E-02, 4.41459E-02, 4.786617e-05]

geometries:
  structures:
  - name: Pin
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}

  lattices:
  - name: L31
    cell_map:
      [Pin]

  assemblies:
  - name: A31
    axial: 
    - {slice: L31, height: 1.0}

  core:
    name: VERA_1D
    type: SQUARE
    symmetry: 1
    assembly_pitch: 1.26
    cell_pitch: 1.26
    plane_max_thickness: 10.0
    outer_albedo: 1.0
    assembly_map: 
      [A31]
    top_boundary_condition: REFLECTIVE
    bottom_boundary_condition: REFLECTIVE
 
state:
  system_pressure: 15.516
  moderator_temperature: 600
  fuel_temperature: 1200
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.03

to_openmc:
  openmc_settings:
    batches: 2000
    inactive: 500
    particles: 200000

3.5. VERA_1E

materials:
- name: Fuel_31
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: ZRB2
  elements: [B-10b, B-11, Zr-nat]
  number_densities: [2.16410E-02, 1.96824E-02, 2.06617E-02]
- name: MOD
  elements: [O-nat, H-H2O, B-nat]
  number_densities: [2.48112E-02, 4.96224E-02, 5.38041E-05]

geometries:
  structures:
  - name: Pin
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4106}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: ZRB2, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: Zircaloy-4, space: 4-3}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}

  lattices:
  - name: L31
    cell_map:
      [Pin]

  assemblies:
  - name: A31
    axial: 
    - {slice: L31, height: 1.0}

  core:
    name: VERA_1E
    type: SQUARE
    symmetry: 1
    assembly_pitch: 1.26
    cell_pitch: 1.26
    plane_max_thickness: 10.0
    outer_albedo: 1.0
    assembly_map: 
      [A31]
    top_boundary_condition: REFLECTIVE
    bottom_boundary_condition: REFLECTIVE
 
state:
  system_pressure: 15.516
  moderator_temperature: 565
  fuel_temperature: 600
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.005

to_openmc:
  openmc_settings:
    batches: 2000
    inactive: 500
    particles: 200000

3.6. VERA_2A

materials:
- name: Fuel_31
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: MOD
  elements: [O-nat, H-H2O, B-nat]
  number_densities: [2.48112E-02, 4.96224E-02, 5.38041E-05]

geometries:
  structures:
  - name: F31
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3239, 0.4581]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}

  lattices:
  - name: L31
    cell_map:
      [F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, IT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31]

  assemblies:
  - name: A31
    axial: 
    - {slice: L31, height: 1.0}

  core:
    name: VERA_2A
    type: SQUARE
    symmetry: 8
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 10.0
    outer_albedo: 1.0
    assembly_map: 
      [A31]
    top_boundary_condition: REFLECTIVE
    bottom_boundary_condition: REFLECTIVE
 
state:
  system_pressure: 15.516
  moderator_temperature: 565
  fuel_temperature: 565
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.05

to_openmc:
  openmc_settings:
    batches: 2000
    inactive: 500
    particles: 200000

3.7. VERA_2B

materials:
- name: Fuel_31
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: MOD
  elements: [O-nat, H-H2O, B-nat]
  number_densities: [2.20729E-02, 4.41459E-02, 4.786617e-05]

geometries:
  structures:
  - name: F31
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3239, 0.4581]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}

  lattices:
  - name: L31
    cell_map:
      [F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, IT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31]

  assemblies:
  - name: A31
    axial: 
    - {slice: L31, height: 1.0}

  core:
    name: VERA_2B
    type: SQUARE
    symmetry: 8
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 10.0
    outer_albedo: 1.0
    assembly_map: 
      [A31]
    top_boundary_condition: REFLECTIVE
    bottom_boundary_condition: REFLECTIVE
 
state:
  system_pressure: 15.516
  moderator_temperature: 600
  fuel_temperature: 600
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.05

to_openmc:
  openmc_settings:
    batches: 2000
    inactive: 500
    particles: 200000

3.8. VERA_2C

materials:
- name: Fuel_31
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: MOD
  elements: [O-nat, H-H2O, B-nat]
  number_densities: [2.20729E-02, 4.41459E-02, 4.786617e-05]

geometries:
  structures:
  - name: F31
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3239, 0.4581]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}


  lattices:
  - name: L31
    cell_map:
      [F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, IT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31]

  assemblies:
  - name: A31
    axial: 
    - {slice: L31, height: 1.0}

  core:
    name: VERA_2C
    type: SQUARE
    symmetry: 8
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 10.0
    outer_albedo: 1.0
    assembly_map: 
      [A31]
    top_boundary_condition: REFLECTIVE
    bottom_boundary_condition: REFLECTIVE
 
state:
  system_pressure: 15.516
  moderator_temperature: 600
  fuel_temperature: 900
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.05

to_openmc:
  openmc_settings:
    batches: 2000
    inactive: 500
    particles: 200000

3.9. VERA_2D

materials:
- name: Fuel_31
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: MOD
  elements: [O-nat, H-H2O, B-nat]
  number_densities: [2.20729E-02, 4.41459E-02, 4.786617e-05]

geometries:
  structures:
  - name: F31
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3239, 0.4581]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}

  lattices:
  - name: L31
    cell_map:
      [F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, IT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31]

  assemblies:
  - name: A31
    axial: 
    - {slice: L31, height: 1.0}

  core:
    name: VERA_2D
    type: SQUARE
    symmetry: 8
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 10.0
    outer_albedo: 1.0
    assembly_map: 
      [A31]
    top_boundary_condition: REFLECTIVE
    bottom_boundary_condition: REFLECTIVE
 
state:
  system_pressure: 15.516
  moderator_temperature: 600
  fuel_temperature: 1200
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.05

to_openmc:
  openmc_settings:
    batches: 2000
    inactive: 500
    particles: 200000

3.10. VERA_2E

materials:
- name: Fuel_31
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: Pyrex
  elements: [B-10b, B-11, O-nat, Si-nat]
  number_densities: [9.63266E-04, 3.90172E-03, 4.67761E-02, 1.9732607e-02]
- name: SS304
  elements: [C-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [3.20895E-04, 1.7153747e-03, 6.99938E-05, 1.7604461e-02, 1.75387E-03, 5.8986522e-02, 7.797858e-03]
- name: MOD
  elements: [O-nat, H-H2O, B-nat]
  number_densities: [2.48112E-02, 4.96224E-02, 5.38041E-05]

geometries:
  structures:
  - name: F31
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [-0.475]}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3239, 0.4581]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}
  - name: PBP
    primitives:
    - {type: CIRCLE, radius: 0.214}
    - {type: CIRCLE, radius: 0.231}
    - {type: CIRCLE, radius: 0.241}
    - {type: CIRCLE, radius: 0.427}
    - {type: CIRCLE, radius: 0.437}
    - {type: CIRCLE, radius: 0.484}
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Helium, space: '1'}
    - {material: SS304, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: Pyrex, space: 4-3}
    - {material: Helium, space: 5-4}
    - {material: SS304, space: 6-5}
    - {material: MOD, space: 7-6}
    - {material: Zircaloy-4, space: 8-7}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.32, 0.65]}

  lattices:
  - name: LP12
    cell_map:
      [F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,PBP,F31,F31, GT,F31,F31,PBP,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,PBP,F31,F31, GT,F31,F31,PBP,F31,F31, GT,F31,F31,PBP,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31,PBP,F31,F31, IT,F31,F31,PBP,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,PBP,F31,F31, GT,F31,F31,PBP,F31,F31, GT,F31,F31,PBP,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31,PBP,F31,F31, GT,F31,F31, PBP,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31]

  assemblies:
  - name: AP12
    axial: 
    - {slice: LP12, height: 1.0}

  core:
    name: VERA_2E
    type: SQUARE
    symmetry: 8
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 10.0
    outer_albedo: 1.0
    assembly_map: 
      [AP12]
    top_boundary_condition: REFLECTIVE
    bottom_boundary_condition: REFLECTIVE
 
state:
  system_pressure: 15.516
  moderator_temperature: 600
  fuel_temperature: 600
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.05

to_openmc:
  openmc_settings:
    batches: 2000
    inactive: 500
    particles: 200000

3.11. VERA_2F

materials:
- name: Fuel_31
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: Pyrex
  elements: [B-10b, B-11, O-nat, Si-nat]
  number_densities: [9.63266E-04, 3.90172E-03, 4.67761E-02, 1.9732607e-02]
- name: SS304
  elements: [C-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [3.20895E-04, 1.7153747e-03, 6.99938E-05, 1.7604461e-02, 1.75387E-03, 5.8986522e-02, 7.797858e-03]
- name: MOD
  elements: [O-nat, H-H2O, B-nat]
  number_densities: [2.48112E-02, 4.96224E-02, 5.38041E-05]

geometries:
  structures:
  - name: F31
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3239, 0.4581]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}
  - name: PBP
    primitives:
    - {type: CIRCLE, radius: 0.214}
    - {type: CIRCLE, radius: 0.231}
    - {type: CIRCLE, radius: 0.241}
    - {type: CIRCLE, radius: 0.427}
    - {type: CIRCLE, radius: 0.437}
    - {type: CIRCLE, radius: 0.484}
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Helium, space: '1'}
    - {material: SS304, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: Pyrex, space: 4-3}
    - {material: Helium, space: 5-4}
    - {material: SS304, space: 6-5}
    - {material: MOD, space: 7-6}
    - {material: Zircaloy-4, space: 8-7}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.241, 0.32]}

  lattices:
  - name: LP24
    cell_map:
      [F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,PBP,F31,F31,PBP,F31,F31,PBP,F31,F31,F31,F31,F31,
       F31,F31,F31,PBP,F31,F31,F31,F31,F31,F31,F31,F31,F31,PBP,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,PBP,F31,F31,PBP,F31,F31,PBP,F31,F31,PBP,F31,F31,PBP,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,PBP,F31,F31,PBP,F31,F31, IT,F31,F31,PBP,F31,F31,PBP,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,PBP,F31,F31,PBP,F31,F31,PBP,F31,F31,PBP,F31,F31,PBP,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,PBP,F31,F31,F31,F31,F31,F31,F31,F31,F31,PBP,F31,F31,F31,
       F31,F31,F31,F31,F31,PBP,F31,F31,PBP,F31,F31,PBP,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31]

  assemblies:
  - name: AP24
    axial: 
    - {slice: LP24, height: 1.0}

  core:
    name: VERA_2F
    type: SQUARE
    symmetry: 8
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 10.0
    outer_albedo: 1.0
    assembly_map: 
      [AP24]
    top_boundary_condition: REFLECTIVE
    bottom_boundary_condition: REFLECTIVE
 
state:
  system_pressure: 15.516
  moderator_temperature: 600
  fuel_temperature: 600
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.05

to_openmc:
  openmc_settings:
    batches: 2000
    inactive: 500
    particles: 200000

3.12. VERA_2G

materials:
- name: Fuel_31
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: AIC
  elements: [Ag-nat, Cd-nat, In-nat]
  number_densities: [4.55562e-02, 2.7321858e-03, 8.024762e-03]
- name: SS304
  elements: [C-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [3.20895E-04, 1.7153747e-03, 6.99938E-05, 1.7604461e-02, 1.75387E-03, 5.8986522e-02, 7.797858e-03]
- name: MOD
  elements: [O-nat, H-H2O, B-nat]
  number_densities: [2.48112E-02, 4.96224E-02, 5.38041E-05]

geometries:
  structures:
  - name: F31
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3239, 0.4581]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}
  - name: AIC
    primitives:
    - {type: CIRCLE, radius: 0.382}
    - {type: CIRCLE, radius: 0.386}
    - {type: CIRCLE, radius: 0.484}
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: AIC, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: SS304, space: 3-2}
    - {material: MOD, space: 4-3}
    - {material: Zircaloy-4, space: 5-4}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.2205, 0.3119]}

  lattices:
  - name: LA24
    cell_map:
      [F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,AIC,F31,F31,AIC,F31,F31,AIC,F31,F31,F31,F31,F31,
       F31,F31,F31,AIC,F31,F31,F31,F31,F31,F31,F31,F31,F31,AIC,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,AIC,F31,F31,AIC,F31,F31,AIC,F31,F31,AIC,F31,F31,AIC,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,AIC,F31,F31,AIC,F31,F31, IT,F31,F31,AIC,F31,F31,AIC,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,AIC,F31,F31,AIC,F31,F31,AIC,F31,F31,AIC,F31,F31,AIC,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,AIC,F31,F31,F31,F31,F31,F31,F31,F31,F31,AIC,F31,F31,F31,
       F31,F31,F31,F31,F31,AIC,F31,F31,AIC,F31,F31,AIC,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31]

  assemblies:
  - name: AA24
    axial: 
    - {slice: LA24, height: 1.0}

  core:
    name: VERA_2G
    type: SQUARE
    symmetry: 8
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 10.0
    outer_albedo: 1.0
    assembly_map: 
      [AA24]
    top_boundary_condition: REFLECTIVE
    bottom_boundary_condition: REFLECTIVE
 
state:
  system_pressure: 15.516
  moderator_temperature: 600
  fuel_temperature: 600
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.05

to_openmc:
  openmc_settings:
    batches: 2000
    inactive: 500
    particles: 200000

3.13. VERA_2H

materials:
- name: Fuel_31
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: B4C
  elements: [B-nat, C-nat]
  number_densities: [7.6728E-02, 1.91820E-02]
- name: SS304
  elements: [C-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [3.20895E-04, 1.7153747e-03, 6.99938E-05, 1.7604461e-02, 1.75387E-03, 5.8986522e-02, 7.797858e-03]
- name: MOD
  elements: [O-nat, H-H2O, B-nat]
  number_densities: [2.48112E-02, 4.96224E-02, 5.38041E-05]

geometries:
  structures:
  - name: F31
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3239, 0.4581]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}
  - name: B4C
    primitives:
    - {type: CIRCLE, radius: 0.373}
    - {type: CIRCLE, radius: 0.386}
    - {type: CIRCLE, radius: 0.484}
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: B4C, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: SS304, space: 3-2}
    - {material: MOD, space: 4-3}
    - {material: Zircaloy-4, space: 5-4}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.2205, 0.3119]}

  lattices:
  - name: LA24
    cell_map:
      [F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,B4C,F31,F31,B4C,F31,F31,B4C,F31,F31,F31,F31,F31,
       F31,F31,F31,B4C,F31,F31,F31,F31,F31,F31,F31,F31,F31,B4C,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,B4C,F31,F31,B4C,F31,F31,B4C,F31,F31,B4C,F31,F31,B4C,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,B4C,F31,F31,B4C,F31,F31, IT,F31,F31,B4C,F31,F31,B4C,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,B4C,F31,F31,B4C,F31,F31,B4C,F31,F31,B4C,F31,F31,B4C,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,B4C,F31,F31,F31,F31,F31,F31,F31,F31,F31,B4C,F31,F31,F31,
       F31,F31,F31,F31,F31,B4C,F31,F31,B4C,F31,F31,B4C,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31]

  assemblies:
  - name: AA24
    axial: 
    - {slice: LA24, height: 1.0}

  core:
    name: VERA_2H
    type: SQUARE
    symmetry: 8
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 10.0
    outer_albedo: 1.0
    assembly_map: 
      [AA24]
    top_boundary_condition: REFLECTIVE
    bottom_boundary_condition: REFLECTIVE
 
state:
  system_pressure: 15.516
  moderator_temperature: 600
  fuel_temperature: 600
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.05

to_openmc:
  openmc_settings:
    batches: 2000
    inactive: 500
    particles: 200000

3.14. VERA_2I

materials:
- name: Fuel_31
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: SS304
  elements: [C-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [3.20895E-04, 1.7153747e-03, 6.99938E-05, 1.7604461e-02, 1.75387E-03, 5.8986522e-02, 7.797858e-03]
- name: MOD
  elements: [O-nat, H-H2O, B-nat]
  number_densities: [2.48112E-02, 4.96224E-02, 5.38041E-05]

geometries:
  structures:
  - name: F31
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3239, 0.4581]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.258}
    - {type: CIRCLE, radius: 0.382}
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: AIR, space: '1'}
    - {material: SS304, space: 2-1}
    - {material: MOD, space: 3-2}
    - {material: Zircaloy-4, space: 4-3}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}

  lattices:
  - name: LAIT
    cell_map:
      [F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, IT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31]

  assemblies:
  - name: AAIT
    axial: 
    - {slice: LAIT, height: 1.0}

  core:
    name: VERA_2I
    type: SQUARE
    symmetry: 8
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 10.0
    outer_albedo: 1.0
    assembly_map: 
      [AAIT]
    top_boundary_condition: REFLECTIVE
    bottom_boundary_condition: REFLECTIVE
 
state:
  system_pressure: 15.516
  moderator_temperature: 600
  fuel_temperature: 600
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.05

to_openmc:
  openmc_settings:
    batches: 2000
    inactive: 500
    particles: 200000

3.15. VERA_2J

materials:
- name: Fuel_31
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: Pyrex
  elements: [B-10b, B-11, O-nat, Si-nat]
  number_densities: [9.63266E-04, 3.90172E-03, 4.67761E-02, 1.9732607e-02]
- name: SS304
  elements: [C-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [3.20895E-04, 1.7153747e-03, 6.99938E-05, 1.7604461e-02, 1.75387E-03, 5.8986522e-02, 7.797858e-03]
- name: MOD
  elements: [O-nat, H-H2O, B-nat]
  number_densities: [2.48112E-02, 4.96224E-02, 5.38041E-05]

geometries:
  structures:
  - name: F31
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3239, 0.4581]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.258}
    - {type: CIRCLE, radius: 0.382}
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: AIR, space: '1'}
    - {material: SS304, space: 2-1}
    - {material: MOD, space: 3-2}
    - {material: Zircaloy-4, space: 4-3}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}
  - name: PBP
    primitives:
    - {type: CIRCLE, radius: 0.214}
    - {type: CIRCLE, radius: 0.231}
    - {type: CIRCLE, radius: 0.241}
    - {type: CIRCLE, radius: 0.427}
    - {type: CIRCLE, radius: 0.437}
    - {type: CIRCLE, radius: 0.484}
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Helium, space: '1'}
    - {material: SS304, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: Pyrex, space: 4-3}
    - {material: Helium, space: 5-4}
    - {material: SS304, space: 6-5}
    - {material: MOD, space: 7-6}
    - {material: Zircaloy-4, space: 8-7}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.241, 0.32, 0.58]}

  lattices:
  - name: LP24
    cell_map:
      [F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,PBP,F31,F31,PBP,F31,F31,PBP,F31,F31,F31,F31,F31,
       F31,F31,F31,PBP,F31,F31,F31,F31,F31,F31,F31,F31,F31,PBP,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,PBP,F31,F31,PBP,F31,F31,PBP,F31,F31,PBP,F31,F31,PBP,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,PBP,F31,F31,PBP,F31,F31, IT,F31,F31,PBP,F31,F31,PBP,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,PBP,F31,F31,PBP,F31,F31,PBP,F31,F31,PBP,F31,F31,PBP,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,PBP,F31,F31,F31,F31,F31,F31,F31,F31,F31,PBP,F31,F31,F31,
       F31,F31,F31,F31,F31,PBP,F31,F31,PBP,F31,F31,PBP,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31]

  assemblies:
  - name: AP24
    axial: 
    - {slice: LP24, height: 1.0}

  core:
    name: VERA_2J
    type: SQUARE
    symmetry: 8
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 10.0
    outer_albedo: 1.0
    assembly_map: 
      [AP24]
    top_boundary_condition: REFLECTIVE
    bottom_boundary_condition: REFLECTIVE
 
state:
  system_pressure: 15.516
  moderator_temperature: 600
  fuel_temperature: 600
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.05

to_openmc:
  openmc_settings:
    batches: 2000
    inactive: 500
    particles: 200000

3.16. VERA_2K

materials:
- name: Fuel_31
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Fuel_36
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57669E-02, 7.21203E-06, 8.33952E-04, 3.82913E-06, 2.20384E-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: Pyrex
  elements: [B-10b, B-11, O-nat, Si-nat]
  number_densities: [9.63266E-04, 3.90172E-03, 4.67761E-02, 1.9732607e-02]
- name: SS304
  elements: [C-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [3.20895E-04, 1.7153747e-03, 6.99938E-05, 1.7604461e-02, 1.75387E-03, 5.8986522e-02, 7.797858e-03]
- name: MOD
  elements: [O-nat, H-H2O, B-nat]
  number_densities: [2.48112E-02, 4.96224E-02, 5.38041E-05]

geometries:
  structures:
  - &FU 
    name: F31
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - <<: *FU
    name: F36
    regions:
    - {material: Fuel_36, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3239, 0.4581]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}
  - name: PBP
    primitives:
    - {type: CIRCLE, radius: 0.214}
    - {type: CIRCLE, radius: 0.231}
    - {type: CIRCLE, radius: 0.241}
    - {type: CIRCLE, radius: 0.427}
    - {type: CIRCLE, radius: 0.437}
    - {type: CIRCLE, radius: 0.484}
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Helium, space: '1'}
    - {material: SS304, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: Pyrex, space: 4-3}
    - {material: Helium, space: 5-4}
    - {material: SS304, space: 6-5}
    - {material: MOD, space: 7-6}
    - {material: Zircaloy-4, space: 8-7}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.241, 0.32]}

  lattices:
  - name: LZP24
    cell_map:
      [F31,F31,F31,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F31,F31,F31,
       F31,F31,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F31,F31,
       F31,F36,F36,F36,F36,PBP,F36,F36,PBP,F36,F36,PBP,F36,F36,F36,F36,F31,
       F36,F36,F36,PBP,F36,F36,F36,F36,F36,F36,F36,F36,F36,PBP,F36,F36,F36,
       F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,
       F36,F36,PBP,F36,F36,PBP,F36,F36,PBP,F36,F36,PBP,F36,F36,PBP,F36,F36,
       F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,
       F36,F36,F36,F36,F36,F36,F36,F36,F31,F36,F36,F36,F36,F36,F36,F36,F36,
       F36,F36,PBP,F36,F36,PBP,F36,F31, IT,F31,F36,PBP,F36,F36,PBP,F36,F36,
       F36,F36,F36,F36,F36,F36,F36,F36,F31,F36,F36,F36,F36,F36,F36,F36,F36,
       F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,
       F36,F36,PBP,F36,F36,PBP,F36,F36,PBP,F36,F36,PBP,F36,F36,PBP,F36,F36,
       F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,
       F36,F36,F36,PBP,F36,F36,F36,F36,F36,F36,F36,F36,F36,PBP,F36,F36,F36,
       F31,F36,F36,F36,F36,PBP,F36,F36,PBP,F36,F36,PBP,F36,F36,F36,F36,F31,
       F31,F31,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F31,F31,
       F31,F31,F31,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F36,F31,F31,F31]

  assemblies:
  - name: AZP24
    axial: 
    - {slice: LZP24, height: 1.0}

  core:
    name: VERA_2K
    type: SQUARE
    symmetry: 8
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 10.0
    outer_albedo: 1.0
    assembly_map: 
      [AZP24]
    top_boundary_condition: REFLECTIVE
    bottom_boundary_condition: REFLECTIVE
 
state:
  system_pressure: 15.516
  moderator_temperature: 600
  fuel_temperature: 600
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.05

to_openmc:
  openmc_settings:
    batches: 2000
    inactive: 500
    particles: 200000

3.17. VERA_2L

materials:
- name: Fuel_31
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: ZRB2
  elements: [B-10b, B-11, Zr-nat]
  number_densities: [2.16410E-02, 1.96824E-02, 2.06617E-02]
- name: MOD
  elements: [O-nat, H-H2O, B-nat]
  number_densities: [2.48112E-02, 4.96224E-02, 5.38041E-05]

geometries:
  structures:
  - name: F31
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3239, 0.4581]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}
  - name: IFBA
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4106}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: ZRB2, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: Zircaloy-4, space: 4-3}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}


  lattices:
  - name: L31I80
    cell_map:
     [IFBA, F31, F31, F31, F31, F31, F31, F31, F31, F31, F31, F31, F31, F31, F31, F31,IFBA,
       F31, F31, F31, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31, F31, F31, F31,
       F31, F31,IFBA, F31,IFBA,  GT, F31,IFBA,  GT,IFBA, F31,  GT,IFBA, F31,IFBA, F31, F31,
       F31, F31, F31,  GT,IFBA,IFBA, F31, F31, F31, F31, F31,IFBA,IFBA,  GT, F31, F31, F31,
       F31, F31,IFBA,IFBA, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31,IFBA,IFBA, F31, F31,
       F31,IFBA,  GT,IFBA,IFBA,  GT, F31,IFBA,  GT,IFBA, F31,  GT,IFBA,IFBA,  GT,IFBA, F31,
       F31, F31, F31, F31, F31, F31,IFBA, F31, F31, F31,IFBA, F31, F31, F31, F31, F31, F31,
       F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,
       F31,IFBA,  GT, F31,IFBA,  GT, F31,IFBA,  IT,IFBA, F31,  GT,IFBA, F31,  GT,IFBA, F31,
       F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,
       F31, F31, F31, F31, F31, F31,IFBA, F31, F31, F31,IFBA, F31, F31, F31, F31, F31, F31,
       F31,IFBA,  GT,IFBA,IFBA,  GT, F31,IFBA,  GT,IFBA, F31,  GT,IFBA,IFBA,  GT,IFBA, F31,
       F31, F31,IFBA,IFBA, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31,IFBA,IFBA, F31, F31,
       F31, F31, F31,  GT,IFBA,IFBA, F31, F31, F31, F31, F31,IFBA,IFBA,  GT, F31, F31, F31,
       F31, F31,IFBA, F31,IFBA,  GT, F31,IFBA,  GT,IFBA, F31,  GT,IFBA, F31,IFBA, F31, F31,
       F31, F31, F31, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31, F31, F31, F31,
      IFBA, F31, F31, F31, F31, F31, F31, F31, F31, F31, F31, F31, F31, F31, F31, F31,IFBA]

  assemblies:
  - name: A31I80
    axial: 
    - {slice: L31I80, height: 1.0}

  core:
    name: VERA_2L
    type: SQUARE
    symmetry: 8
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 10.0
    outer_albedo: 1.0
    assembly_map: 
      [A31I80]
    top_boundary_condition: REFLECTIVE
    bottom_boundary_condition: REFLECTIVE
 
state:
  system_pressure: 15.516
  moderator_temperature: 600
  fuel_temperature: 600
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.005

to_openmc:
  openmc_settings:
    batches: 2000
    inactive: 500
    particles: 200000

3.18. VERA_2M

materials:
- name: Fuel_31
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: ZRB2
  elements: [B-10b, B-11, Zr-nat]
  number_densities: [2.16410E-02, 1.96824E-02, 2.06617E-02]
- name: MOD
  elements: [O-nat, H-H2O, B-nat]
  number_densities: [2.48112E-02, 4.96224E-02, 5.38041E-05]

geometries:
  structures:
  - name: F31
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3239, 0.4581]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}
  - name: IFBA
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4106}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: ZRB2, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: Zircaloy-4, space: 4-3}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}


  lattices:
  - name: L31I128
    cell_map:
     [IFBA, F31, F31, F31,IFBA, F31, F31,IFBA, F31,IFBA, F31, F31,IFBA, F31, F31, F31,IFBA,
       F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,
       F31,IFBA, F31,IFBA,IFBA,  GT,IFBA,IFBA,  GT,IFBA,IFBA,  GT,IFBA,IFBA, F31,IFBA, F31,
       F31, F31,IFBA,  GT,IFBA,IFBA, F31, F31,IFBA, F31, F31,IFBA,IFBA,  GT,IFBA, F31, F31,
      IFBA, F31,IFBA,IFBA, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31,IFBA,IFBA, F31,IFBA,
       F31,IFBA,  GT,IFBA,IFBA,  GT,IFBA,IFBA,  GT,IFBA,IFBA,  GT,IFBA,IFBA,  GT,IFBA, F31,
       F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,
      IFBA, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31,IFBA,
       F31,IFBA,  GT,IFBA,IFBA,  GT,IFBA,IFBA,  IT,IFBA,IFBA,  GT,IFBA,IFBA,  GT,IFBA, F31,
      IFBA, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31,IFBA,
       F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,
       F31,IFBA,  GT,IFBA,IFBA,  GT,IFBA,IFBA,  GT,IFBA,IFBA,  GT,IFBA,IFBA,  GT,IFBA, F31,
      IFBA, F31,IFBA,IFBA, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31,IFBA,IFBA, F31,IFBA,
       F31, F31,IFBA,  GT,IFBA,IFBA, F31, F31,IFBA, F31, F31,IFBA,IFBA,  GT,IFBA, F31, F31,
       F31,IFBA, F31,IFBA,IFBA,  GT,IFBA,IFBA,  GT,IFBA,IFBA,  GT,IFBA,IFBA, F31,IFBA, F31,
       F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,
      IFBA, F31, F31, F31,IFBA, F31, F31,IFBA, F31,IFBA, F31, F31,IFBA, F31, F31, F31,IFBA]

  assemblies:
  - name: A31I128
    axial: 
    - {slice: L31I128, height: 1.0}

  core:
    name: VERA_2M
    type: SQUARE
    symmetry: 8
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 10.0
    outer_albedo: 1.0
    assembly_map: 
      [A31I128]
    top_boundary_condition: REFLECTIVE
    bottom_boundary_condition: REFLECTIVE
 
state:
  system_pressure: 15.516
  moderator_temperature: 600
  fuel_temperature: 600
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.005

to_openmc:
  openmc_settings:
    batches: 2000
    inactive: 500
    particles: 200000

3.19. VERA_2N

materials:
- name: Fuel_31
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: ZRB2
  elements: [B-10b, B-11, Zr-nat]
  number_densities: [2.16410E-02, 1.96824E-02, 2.06617E-02]
- name: B4C-AL2O3
  elements: [B-10b, B-11, C-nat, O-nat, Al-nat]
  number_densities: [2.98553E-03, 1.21192E-02, 3.77001E-03, 5.85563E-02, 3.90223E-02]
- name: MOD
  elements: [O-nat, H-H2O, B-nat]
  number_densities: [2.48112E-02, 4.96224E-02, 5.38041E-05]

geometries:
  structures:
  - name: F31
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3239, 0.4581]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}
  - name: IFBA
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4106}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: ZRB2, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: Zircaloy-4, space: 4-3}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: WABA
    primitives:
    - {type: CIRCLE, radius: 0.286}
    - {type: CIRCLE, radius: 0.339}
    - {type: CIRCLE, radius: 0.353}
    - {type: CIRCLE, radius: 0.404}
    - {type: CIRCLE, radius: 0.418}
    - {type: CIRCLE, radius: 0.484}
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: MOD, space: '1'}
    - {material: Zircaloy-4, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: B4C-AL2O3, space: 4-3}
    - {material: Helium, space: 5-4}
    - {material: Zircaloy-4, space: 6-5}
    - {material: MOD, space: 7-6}
    - {material: Zircaloy-4, space: 8-7}
    meshing: {type: SECTORS, num_azimuths: 8}

  lattices:
  - name: L31I104W20
    cell_map:
     [IFBA, F31, F31, F31, F31, F31, F31, F31, F31, F31, F31, F31, F31, F31, F31, F31,IFBA,
       F31, F31, F31, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31, F31, F31, F31,
       F31, F31, F31,IFBA,IFBA,WABA,IFBA,IFBA,WABA,IFBA,IFBA,WABA,IFBA,IFBA, F31, F31, F31,
       F31, F31,IFBA,WABA,IFBA,IFBA, F31, F31,IFBA, F31, F31,IFBA,IFBA,WABA,IFBA, F31, F31,
       F31, F31,IFBA,IFBA, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31,IFBA,IFBA, F31, F31,
       F31,IFBA,WABA,IFBA,IFBA,  GT,IFBA,IFBA,WABA,IFBA,IFBA,  GT,IFBA,IFBA,WABA,IFBA, F31,
       F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,
       F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,
       F31,IFBA,WABA,IFBA,IFBA,WABA,IFBA,IFBA,  IT,IFBA,IFBA,WABA,IFBA,IFBA,WABA,IFBA, F31,
       F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,
       F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31,
       F31,IFBA,WABA,IFBA,IFBA,  GT,IFBA,IFBA,WABA,IFBA,IFBA,  GT,IFBA,IFBA,WABA,IFBA, F31,
       F31, F31,IFBA,IFBA, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31,IFBA,IFBA, F31, F31,
       F31, F31,IFBA,WABA,IFBA,IFBA, F31, F31,IFBA, F31, F31,IFBA,IFBA,WABA,IFBA, F31, F31,
       F31, F31, F31,IFBA,IFBA,WABA,IFBA,IFBA,WABA,IFBA,IFBA,WABA,IFBA,IFBA, F31, F31, F31,
       F31, F31, F31, F31, F31,IFBA, F31, F31,IFBA, F31, F31,IFBA, F31, F31, F31, F31, F31,
      IFBA, F31, F31, F31, F31, F31, F31, F31, F31, F31, F31, F31, F31, F31, F31, F31,IFBA]

  assemblies:
  - name: A31I104W20
    axial: 
    - {slice: L31I104W20, height: 1.0}

  core:
    name: VERA_2N
    type: SQUARE
    symmetry: 8
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 10.0
    outer_albedo: 1.0
    assembly_map: 
      [A31I104W20]
    top_boundary_condition: REFLECTIVE
    bottom_boundary_condition: REFLECTIVE
 
state:
  system_pressure: 15.516
  moderator_temperature: 600
  fuel_temperature: 600
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.005

to_openmc:
  openmc_settings:
    batches: 2000
    inactive: 500
    particles: 200000

3.20. VERA_2O

materials:
- name: Fuel_31
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: UO2-GD2O3
  elements: [U-234, U-235, U-236, U-238, Gd-154, Gd-155, Gd-156, Gd-157, Gd-158, O-nat]
  number_densities: [3.18096E-06, 3.90500E-04, 1.79300E-06, 2.10299E-02, 3.66190E-05, 2.48606E-04, 3.43849E-04, 2.62884E-04, 4.17255E-04, 4.53705E-02]
- name: MOD
  elements: [O-nat, H-H2O, B-nat]
  number_densities: [2.48112E-02, 4.96224E-02, 5.38041E-05]
  

geometries:
  structures:
  - name: F31
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3239, 0.4581]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}
  - name: GD
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: UO2-GD2O3, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.1295, 0.1831, 0.2243, 0.2590, 0.2896, 0.3173, 0.3427, 0.3663, 0.3886, 0.5800]}

  lattices:
  - name: L31GD12
    cell_map:
      [F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GD,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GD,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31,F31, GD,F31,F31,F31, GD,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31, GD,F31,F31,F31,F31,F31,F31,F31, GD,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, IT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31, GD,F31,F31,F31,F31,F31,F31,F31, GD,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31, GD,F31,F31,F31, GD,F31,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31, GD,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GD,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31]

  assemblies:
  - name: A31GD12
    axial: 
    - {slice: L31GD12, height: 1.0}

  core:
    name: VERA_2O
    type: SQUARE
    symmetry: 8
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 10.0
    outer_albedo: 1.0
    assembly_map: 
      [A31GD12]
    top_boundary_condition: REFLECTIVE
    bottom_boundary_condition: REFLECTIVE
 
state:
  system_pressure: 15.516
  moderator_temperature: 600
  fuel_temperature: 600
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.05

to_openmc:
  openmc_settings:
    batches: 2000
    inactive: 500
    particles: 200000

3.21. VERA_2P

materials:
- name: Fuel_31
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: UO2-GD2O3
  elements: [U-234, U-235, U-236, U-238, Gd-154, Gd-155, Gd-156, Gd-157, Gd-158, O-nat]
  number_densities: [3.18096E-06, 3.90500E-04, 1.79300E-06, 2.10299E-02, 3.66190E-05, 2.48606E-04, 3.43849E-04, 2.62884E-04, 4.17255E-04, 4.53705E-02]
- name: MOD
  elements: [O-nat, H-H2O, B-nat]
  number_densities: [2.48112E-02, 4.96224E-02, 5.38041E-05]
  

geometries:
  structures:
  - name: F31
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3239, 0.4581]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}
  - name: GD
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: UO2-GD2O3, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.1295, 0.1831, 0.2243, 0.2590, 0.2896, 0.3173, 0.3427, 0.3663, 0.3886, 0.5800]}

  lattices:
  - name: L31GD24
    cell_map:
      [F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31, GD,F31,F31,F31,F31,F31, GD,F31,F31,F31,F31,F31,
       F31,F31, GD,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GD,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31, GD,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31, GD,F31,F31,F31,F31,F31,F31,F31, GD,F31,F31,F31,F31,
       F31, GD, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT, GD,F31,
       F31,F31,F31,F31,F31,F31, GD,F31,F31,F31, GD,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT, GD,F31, GT,F31,F31, IT,F31,F31, GT,F31, GD, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31, GD,F31,F31,F31, GD,F31,F31,F31,F31,F31,F31,
       F31, GD, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT, GD,F31,
       F31,F31,F31,F31, GD,F31,F31,F31,F31,F31,F31,F31, GD,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31, GD,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31, GD,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GD,F31,F31,
       F31,F31,F31,F31,F31, GD,F31,F31,F31,F31,F31, GD,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31]

  assemblies:
  - name: A31GD24
    axial: 
    - {slice: L31GD24, height: 1.0}

  core:
    name: VERA_2P
    type: SQUARE
    symmetry: 8
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 10.0
    outer_albedo: 1.0
    assembly_map: 
      [A31GD24]
    top_boundary_condition: REFLECTIVE
    bottom_boundary_condition: REFLECTIVE
 
state:
  system_pressure: 15.516
  moderator_temperature: 600
  fuel_temperature: 600
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.05

to_openmc:
  openmc_settings:
    batches: 2000
    inactive: 500
    particles: 200000

3.22. VERA_2Q

materials:
- name: Fuel_31
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: MOD
  elements: [O-nat, H-H2O, B-nat]
  number_densities: [2.48112E-02, 4.96224E-02, 5.38041E-05]

geometries:
  structures:
  - name: F31
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3239, 0.4581]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}
  - name: GRID
    primitives:
    - type: POLYGON
      vertexes:
      - {x: -0.60545, y: -0.60545}
      - {x:  0.60545, y: -0.60545}
      - {x:  0.60545, y:  0.60545}
      - {x: -0.60545, y:  0.60545}
    - type: POLYGON
      vertexes:
      - {x: -0.63000, y: -0.63000}
      - {x:  0.63000, y: -0.63000}
      - {x:  0.63000, y:  0.63000}
      - {x: -0.63000, y:  0.63000}
    regions:
    - {material: Zircaloy-4, space: 2-1}

  lattices:
  - name: L31
    cell_map:
      [F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, IT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31]

  grids:
  - name: intermediate_grid_spacer
    grid_map:
      [GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,
       GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,
       GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,
       GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,
       GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,
       GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,
       GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,
       GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,
       GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,
       GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,
       GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,
       GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,
       GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,
       GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,
       GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,
       GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,
       GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID,GRID]

  assemblies:
  - name: A31GRID
    axial: 
    - {slice: L31, height: 1.0}
    grids:
    - {slice: intermediate_grid_spacer, height: 1.0, position: 0.0}

  core:
    name: VERA_2Q
    type: SQUARE
    symmetry: 8
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 10.0
    outer_albedo: 1.0
    assembly_map: 
      [A31GRID]
    top_boundary_condition: REFLECTIVE
    bottom_boundary_condition: REFLECTIVE
 
state:
  system_pressure: 15.516
  moderator_temperature: 565
  fuel_temperature: 565
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.05

to_openmc:
  openmc_settings:
    batches: 2000
    inactive: 500
    particles: 200000

3.23. VERA_3A

materials:
- name: Fuel_31
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: Inconel
  elements: [Si-nat, Ti-nat, Cr-nat, Fe-nat, Ni-nat]
  number_densities: [4.390283e-03, 2.575975e-03, 1.42283623e-02, 6.182259e-03, 6.1343581e-02]
- name: Top_Nozzle
  elements: [H-H2O, B-nat, C-nat, O-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [4.01211E-02, 4.347852e-05, 6.14459E-05, 2.00606E-02, 3.280602e-04, 1.33861E-05, 3.3668141e-03, 3.35423E-04, 1.12810335e-02, 1.4913264e-03]
- name: Bottom_Nozzle
  elements: [H-H2O, B-nat, C-nat, O-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [3.57661E-02, 3.871934E-05, 8.96008E-05, 1.78830E-02, 4.790789e-04, 1.95482E-05, 4.916672e-03, 4.89830E-04, 1.647405189e-02, 2.1778303e-03]
- name: Core_Plates
  elements: [H-H2O, B-nat, C-nat, O-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [2.48112E-02, 2.67859e-05, 1.60447E-04, 1.24056E-02, 8.573762e-04, 3.49842E-05, 8.799055e-03, 8.76618E-04, 2.94825369e-02, 1.2442082e-03]
- name: MOD
  elements: [O-nat, H-H2O, B-nat]
  number_densities: [2.48112E-02, 4.96224E-02, 5.38041E-05]

geometries:
  structures:
  - name: F31
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: PLG
    primitives:
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Zircaloy-4, space: '1'}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: PLE
    primitives:
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Helium, space: '1'}
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3239, 0.4581]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}
  - &ref 
    name: ref_mod
    primitives:
    - {type: CIRCLE, radius: 100}
    regions:
    - {material: MOD, space: '1'}
  - <<: *ref
    name: ref_bottom_nozzle
    regions:
    - {material: Bottom_Nozzle, space: '1'}
  - <<: *ref
    name: ref_top_nozzle
    regions:
    - {material: Top_Nozzle, space: '1'}
  - <<: *ref
    name: ref_core_plates
    regions:
    - {material: Core_Plates, space: '1'}
  - &grid 
    name: GRD0
    primitives:
    - type: POLYGON
      vertexes:
      - {x: -0.60545, y: -0.60545}
      - {x:  0.60545, y: -0.60545}
      - {x:  0.60545, y:  0.60545}
      - {x: -0.60545, y:  0.60545}
    - type: POLYGON
      vertexes:
      - {x: -0.63000, y: -0.63000}
      - {x:  0.63000, y: -0.63000}
      - {x:  0.63000, y:  0.63000}
      - {x: -0.63000, y:  0.63000}
    regions:
    - {material: Zircaloy-4, space: 2-1}
  - <<: *grid
    name: GRD1
    regions:
    - {material: Inconel, space: 2-1}

  lattices:
  - name: L31
    cell_map:
      [F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, IT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31]
  - name: lattice_plug
    cell_map:
      [PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, IT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG]
  - name: lattice_plenum
    cell_map:
      [PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, IT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE]
  - name: gap_water
    cell_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', GT, '', '', GT, '', '', GT, '', '', '', '', '',
        '', '', '', GT, '', '', '', '', '', '', '', '', '', GT, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', GT, '', '', GT, '', '', IT, '', '', GT, '', '', GT, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', GT, '', '', '', '', '', '', '', '', '', GT, '', '', '',
        '', '', '', '', '', GT, '', '', GT, '', '', GT, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']

  grids:
  - name: intermediate_grid_spacer
    grid_map:
      [GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0]
  - name: end_grid_spacer
    grid_map:
      [GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1]

  assemblies:
  - name: A31
    axial: 
    - {slice: gap_water, height: 4.228}
    - {slice: lattice_plug, height: 1.67}
    - {slice: L31, height: 365.76}
    - {slice: lattice_plenum, height: 16.0}
    - {slice: lattice_plug, height: 1.67}
    - {slice: gap_water, height: 2.129}
    grids:
    - {slice: end_grid_spacer, height: 3.866, position: 5.898}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 67.242}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 119.442}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 171.642}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 223.842}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 276.042}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 328.242}
    - {slice: end_grid_spacer, height: 3.866, position: 380.214}

  core:
    name: VERA_3A
    type: SQUARE
    symmetry: 8
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 8.3
    outer_albedo: 1.0
    assembly_map: 
      [A31]
    reflector_top:
    - {slice: ref_top_nozzle, height: 8.827}
    - {slice: ref_core_plates, height: 7.6}
    - {slice: ref_mod, height: 20}
    reflector_bottom:
    - {slice: ref_mod, height: 20}
    - {slice: ref_core_plates, height: 5.0}
    - {slice: ref_bottom_nozzle, height: 6.053}
 
state:
  system_pressure: 15.516
  moderator_temperature: 600
  fuel_temperature: 600
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.05

to_openmc:
  openmc_settings:
    batches: 2000
    inactive: 500
    particles: 200000

3.24. VERA_3B

materials:
- name: Fuel_2619
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57617E-02, 5.09503E-06, 6.06733E-04, 2.76809E-06, 2.22663E-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: Pyrex
  elements: [B-10b, B-11, O-nat, Si-nat]
  number_densities: [9.63266E-04, 3.90172E-03, 4.67761E-02, 1.9732607e-02]
- name: SS304
  elements: [C-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [3.20895E-04, 1.7153747e-03, 6.99938E-05, 1.7604461e-02, 1.75387E-03, 5.8986522e-02, 7.797858e-03]
- name: Inconel
  elements: [Si-nat, Ti-nat, Cr-nat, Fe-nat, Ni-nat]
  number_densities: [4.390283e-03, 2.575975e-03, 1.42283623e-02, 6.182259e-03, 6.1343581e-02]
- name: Top_Nozzle
  elements: [H-H2O, B-nat, C-nat, O-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [4.01211E-02, 4.347852e-05, 6.14459E-05, 2.00606E-02, 3.280602e-04, 1.33861E-05, 3.3668141e-03, 3.35423E-04, 1.12810335e-02, 1.4913264e-03]
- name: Bottom_Nozzle
  elements: [H-H2O, B-nat, C-nat, O-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [3.57661E-02, 3.871934E-05, 8.96008E-05, 1.78830E-02, 4.790789e-04, 1.95482E-05, 4.916672e-03, 4.89830E-04, 1.647405189e-02, 2.1778303e-03]
- name: Core_Plates
  elements: [H-H2O, B-nat, C-nat, O-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [2.48112E-02, 2.67859e-05, 1.60447E-04, 1.24056E-02, 8.573762e-04, 3.49842E-05, 8.799055e-03, 8.76618E-04, 2.94825369e-02, 1.2442082e-03]
- name: MOD
  elements: [O-nat, H-H2O, B-nat]
  number_densities: [2.48170E-02, 4.96340E-02, 4.411946e-05]


geometries:
  structures:
  - name: F26
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_2619, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: PLG
    primitives:
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Zircaloy-4, space: '1'}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: PLE
    primitives:
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Helium, space: '1'}
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.32, 0.38]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}
  - name: Pyrex_poison
    primitives:
    - {type: CIRCLE, radius: 0.214}
    - {type: CIRCLE, radius: 0.231}
    - {type: CIRCLE, radius: 0.241}
    - {type: CIRCLE, radius: 0.427}
    - {type: CIRCLE, radius: 0.437}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: Helium, space: '1'}
    - {material: SS304, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: Pyrex, space: 4-3}
    - {material: Helium, space: 5-4}
    - {material: SS304, space: 6-5}
  - name: Pyrex_plug
    primitives:
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: SS304, space: '1'}
  - name: Pyrex_plenum
    primitives:
    - {type: CIRCLE, radius: 0.214}
    - {type: CIRCLE, radius: 0.231}
    - {type: CIRCLE, radius: 0.437}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: Helium, space: '1'}
    - {material: SS304, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: SS304, space: 4-3}
  - &ref 
    name: ref_mod
    primitives:
    - {type: CIRCLE, radius: 100}
    regions:
    - {material: MOD, space: '1'}
  - <<: *ref
    name: ref_bottom_nozzle
    regions:
    - {material: Bottom_Nozzle, space: '1'}
  - <<: *ref
    name: ref_top_nozzle
    regions:
    - {material: Top_Nozzle, space: '1'}
  - <<: *ref
    name: ref_core_plates
    regions:
    - {material: Core_Plates, space: '1'}
  - &grid 
    name: GRD0
    primitives:
    - type: POLYGON
      vertexes:
      - {x: -0.60545, y: -0.60545}
      - {x:  0.60545, y: -0.60545}
      - {x:  0.60545, y:  0.60545}
      - {x: -0.60545, y:  0.60545}
    - type: POLYGON
      vertexes:
      - {x: -0.63000, y: -0.63000}
      - {x:  0.63000, y: -0.63000}
      - {x:  0.63000, y:  0.63000}
      - {x: -0.63000, y:  0.63000}
    regions:
    - {material: Zircaloy-4, space: 2-1}
  - <<: *grid
    name: GRD1
    regions:
    - {material: Inconel, space: 2-1}

  lattices:
  - name: L26
    cell_map:
      [F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,F26,F26,F26,
       F26,F26,F26, GT,F26,F26,F26,F26,F26,F26,F26,F26,F26, GT,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26, GT,F26,F26, GT,F26,F26, IT,F26,F26, GT,F26,F26, GT,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26, GT,F26,F26,F26,F26,F26,F26,F26,F26,F26, GT,F26,F26,F26,
       F26,F26,F26,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26]
  - name: lattice_plug
    cell_map:
      [PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, IT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG]
  - name: lattice_plenum
    cell_map:
      [PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, IT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE]
  - name: gap_water
    cell_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', GT, '', '', GT, '', '', GT, '', '', '', '', '',
        '', '', '', GT, '', '', '', '', '', '', '', '', '', GT, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', GT, '', '', GT, '', '', IT, '', '', GT, '', '', GT, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', GT, '', '', '', '', '', '', '', '', '', GT, '', '', '',
        '', '', '', '', '', GT, '', '', GT, '', '', GT, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']

  grids:
  - name: intermediate_grid_spacer
    grid_map:
      [GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0]
  - name: end_grid_spacer
    grid_map:
      [GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1]

  assemblies:
  - name: A26
    axial: 
    - {slice: gap_water, height: 4.228}
    - {slice: lattice_plug, height: 1.67}
    - {slice: L26, height: 365.76}
    - {slice: lattice_plenum, height: 16.0}
    - {slice: lattice_plug, height: 1.67}
    - {slice: gap_water, height: 2.129}
    grids:
    - {slice: end_grid_spacer, height: 3.866, position: 5.898}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 67.242}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 119.442}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 171.642}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 223.842}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 276.042}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 328.242}
    - {slice: end_grid_spacer, height: 3.866, position: 380.214}

  inserted_rods:
  - name: PR
    axial:
    - {slice: Pyrex_plug, height: 3.866}
    # - {slice: Pyrex_plug, height: 2.54}          # to keep same axial mesh dividing with KENO-VI
    # - {slice: Pyrex_poison, height: 360.68}
    - {slice: Pyrex_poison, height: 361.894}
    - {slice: Pyrex_plenum, height: 22.2}
  
  burnable_absorber_bundle:
  - name: 16P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']

  core:
    name: VERA_3B
    type: SQUARE
    symmetry: 8
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 8.3
    outer_albedo: 1.0
    assembly_map: 
      [A26]
    burnable_absorber_map:
      [16P]
    burnable_absorber_position:
      [5.898]
    reflector_top:
    - {slice: ref_top_nozzle, height: 8.827}
    - {slice: ref_core_plates, height: 7.6}
    - {slice: ref_mod, height: 20}
    reflector_bottom:
    - {slice: ref_mod, height: 20}
    - {slice: ref_core_plates, height: 5.0}
    - {slice: ref_bottom_nozzle, height: 6.053}
 
state:
  system_pressure: 15.516
  moderator_temperature: 565
  fuel_temperature: 565
  boron_concentration: 1066

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.05

to_openmc:
  openmc_settings:
    batches: 2000
    inactive: 500
    particles: 200000

3.25. VERA_4

materials:
- name: Fuel_211
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57591E-02, 4.04814E-06, 4.88801E-04, 2.23756E-06, 2.23844E-02]
- name: Fuel_2619
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57617E-02, 5.09503E-06, 6.06733E-04, 2.76809E-06, 2.22663E-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: Pyrex
  elements: [B-10b, B-11, O-nat, Si-nat]
  number_densities: [9.63266E-04, 3.90172E-03, 4.67761E-02, 1.9732607e-02]
- name: AIC
  elements: [Ag-nat, Cd-nat, In-nat]
  number_densities: [4.55562e-02, 2.7321858e-03, 8.024762e-03]
- name: B4C
  elements: [B-nat, C-nat]
  number_densities: [7.6728E-02, 1.91820E-02]
- name: SS304
  elements: [C-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [3.20895E-04, 1.7153747e-03, 6.99938E-05, 1.7604461e-02, 1.75387E-03, 5.8986522e-02, 7.797858e-03]
- name: Inconel
  elements: [Si-nat, Ti-nat, Cr-nat, Fe-nat, Ni-nat]
  number_densities: [4.390283e-03, 2.575975e-03, 1.42283623e-02, 6.182259e-03, 6.1343581e-02]
- name: Top_Nozzle
  elements: [H-H2O, B-nat, C-nat, O-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [4.01187E-02, 4.5498e-05, 6.13703E-05, 2.00342E-02, 3.280602e-04, 1.33861E-05, 3.3668141e-03, 3.35423E-04, 1.12810335e-02, 1.4913264e-03]
- name: Bottom_Nozzle
  elements: [H-H2O, B-nat, C-nat, O-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [3.57638E-02, 4.057041e-05, 8.96008E-05, 1.78819E-02, 4.790789e-04, 1.95482E-05, 4.916672e-03, 4.89830E-04, 1.647405189e-02, 2.1778303e-03]
- name: Core_Plates
  elements: [H-H2O, B-nat, C-nat, O-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [2.48098E-02, 2.824695e-05, 1.60447E-04, 1.24049E-02, 8.573762e-04, 3.49842E-05, 8.799055e-03, 8.76618E-04, 2.94825369e-02, 1.2442082e-03]
- name: MOD
  elements: [O-nat, H-H2O, B-nat]
  number_densities: [2.48097E-02, 4.96194E-02, 5.62874e-05]

geometries:
  structures:
  - &fuel_pin
    name: F26
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_2619, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - <<: *fuel_pin
    name: F21
    regions:
    - {material: Fuel_211, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
  - name: PLG
    primitives:
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Zircaloy-4, space: '1'}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: CRD_PLG
    primitives:
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: SS304, space: '1'}
  - name: PLE
    primitives:
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Helium, space: '1'}
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.32, 0.38]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}
  - name: AIC_pin
    primitives:
    - {type: CIRCLE, radius: 0.373}
    - {type: CIRCLE, radius: 0.382}
    - {type: CIRCLE, radius: 0.386}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: AIC, space: '1'}
    - {material: AIC, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: SS304, space: 4-3}
  - name: B4C_pin
    primitives:
    - {type: CIRCLE, radius: 0.373}
    - {type: CIRCLE, radius: 0.382}
    - {type: CIRCLE, radius: 0.386}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: B4C, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: SS304, space: 4-3}
  - name: CRD_plenum
    primitives:
    - {type: CIRCLE, radius: 0.373}
    - {type: CIRCLE, radius: 0.382}
    - {type: CIRCLE, radius: 0.386}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: Helium, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: SS304, space: 4-3}
  - name: Pyrex_poison
    primitives:
    - {type: CIRCLE, radius: 0.214}
    - {type: CIRCLE, radius: 0.231}
    - {type: CIRCLE, radius: 0.241}
    - {type: CIRCLE, radius: 0.427}
    - {type: CIRCLE, radius: 0.437}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: Helium, space: '1'}
    - {material: SS304, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: Pyrex, space: 4-3}
    - {material: Helium, space: 5-4}
    - {material: SS304, space: 6-5}
  - name: Pyrex_plug
    primitives:
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: SS304, space: '1'}
  - name: Pyrex_plenum
    primitives:
    - {type: CIRCLE, radius: 0.214}
    - {type: CIRCLE, radius: 0.231}
    - {type: CIRCLE, radius: 0.437}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: Helium, space: '1'}
    - {material: SS304, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: SS304, space: 4-3}
  - &ref 
    name: ref_mod
    primitives:
    - {type: CIRCLE, radius: 100}
    regions:
    - {material: MOD, space: '1'}
  - <<: *ref
    name: ref_bottom_nozzle
    regions:
    - {material: Bottom_Nozzle, space: '1'}
  - <<: *ref
    name: ref_top_nozzle
    regions:
    - {material: Top_Nozzle, space: '1'}
  - <<: *ref
    name: ref_core_plates
    regions:
    - {material: Core_Plates, space: '1'}
  - &grid 
    name: GRD0
    primitives:
    - type: POLYGON
      vertexes:
      - {x: -0.60545, y: -0.60545}
      - {x:  0.60545, y: -0.60545}
      - {x:  0.60545, y:  0.60545}
      - {x: -0.60545, y:  0.60545}
    - type: POLYGON
      vertexes:
      - {x: -0.63000, y: -0.63000}
      - {x:  0.63000, y: -0.63000}
      - {x:  0.63000, y:  0.63000}
      - {x: -0.63000, y:  0.63000}
    regions:
    - {material: Zircaloy-4, space: 2-1}
  - <<: *grid
    name: GRD1
    regions:
    - {material: Inconel, space: 2-1}

  lattices:
  - name: L26
    cell_map:
      [F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,F26,F26,F26,
       F26,F26,F26, GT,F26,F26,F26,F26,F26,F26,F26,F26,F26, GT,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26, GT,F26,F26, GT,F26,F26, IT,F26,F26, GT,F26,F26, GT,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26, GT,F26,F26,F26,F26,F26,F26,F26,F26,F26, GT,F26,F26,F26,
       F26,F26,F26,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26]
  - name: L21
    cell_map:
      [F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,F21,F21,F21,
       F21,F21,F21, GT,F21,F21,F21,F21,F21,F21,F21,F21,F21, GT,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21, GT,F21,F21, GT,F21,F21, IT,F21,F21, GT,F21,F21, GT,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21, GT,F21,F21,F21,F21,F21,F21,F21,F21,F21, GT,F21,F21,F21,
       F21,F21,F21,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21]
  - name: lattice_plug
    cell_map:
      [PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, IT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG]
  - name: lattice_plenum
    cell_map:
      [PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, IT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE]
  - name: gap_water
    cell_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', GT, '', '', GT, '', '', GT, '', '', '', '', '',
        '', '', '', GT, '', '', '', '', '', '', '', '', '', GT, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', GT, '', '', GT, '', '', IT, '', '', GT, '', '', GT, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', GT, '', '', '', '', '', '', '', '', '', GT, '', '', '',
        '', '', '', '', '', GT, '', '', GT, '', '', GT, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']

  grids:
  - name: intermediate_grid_spacer
    grid_map:
      [GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0]
  - name: end_grid_spacer
    grid_map:
      [GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1]

  assemblies:
  - &A26 
    name: A26
    axial: 
    - {slice: gap_water, height: 4.228}
    - {slice: lattice_plug, height: 1.67}
    - {slice: L26, height: 365.76}
    - {slice: lattice_plenum, height: 16.0}
    - {slice: lattice_plug, height: 1.67}
    - {slice: gap_water, height: 2.129}
    grids:
    - {slice: end_grid_spacer, height: 3.866, position: 5.898}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 67.242}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 119.442}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 171.642}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 223.842}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 276.042}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 328.242}
    - {slice: end_grid_spacer, height: 3.866, position: 380.214}
  - <<: *A26
    name: A21
    axial: 
    - {slice: gap_water, height: 4.228}
    - {slice: lattice_plug, height: 1.67}
    - {slice: L21, height: 365.76}
    - {slice: lattice_plenum, height: 16.0}
    - {slice: lattice_plug, height: 1.67}
    - {slice: gap_water, height: 2.129}

  inserted_rods:
  - name: CR
    axial:
    - {slice: AIC_pin, height: 101.6}
    - {slice: B4C_pin, height: 259.08}
    - {slice: CRD_plenum, height: 10.7}
  - name: PR
    axial:
    - {slice: Pyrex_plug, height: 2.54}
    - {slice: Pyrex_poison, height: 360.68}
    - {slice: Pyrex_plenum, height: 22.2}
  
  burnable_absorber_bundle:
  - name: 20P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', PR, '', '', '', '', '', PR, '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
  
  control_rod_bundle:
  - name: 24C
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', CR, '', '', CR, '', '', CR, '', '', '', '', '',
        '', '', '', CR, '', '', '', '', '', '', '', '', '', CR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', CR, '', '', CR, '', '', CR, '', '', CR, '', '', CR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', CR, '', '', CR, '', '', '', '', '', CR, '', '', CR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', CR, '', '', CR, '', '', CR, '', '', CR, '', '', CR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', CR, '', '', '', '', '', '', '', '', '', CR, '', '', '',
        '', '', '', '', '', CR, '', '', CR, '', '', CR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']

  core:
    name: VERA_4
    type: SQUARE
    symmetry: 8
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 8.3
    outer_albedo: 1.0
    assembly_map: 
      [A21, A26, A21,
       A26, A21, A26,
       A21, A26, A21]
    reflector_top:
    - {slice: ref_top_nozzle, height: 8.827}
    - {slice: ref_core_plates, height: 7.6}
    - {slice: ref_mod, height: 20}
    reflector_bottom:
    - {slice: ref_mod, height: 20}
    - {slice: ref_core_plates, height: 5.0}
    - {slice: ref_bottom_nozzle, height: 6.053}
    burnable_absorber_map:
      [ '', 20P,  '',
       20P,  '', 20P,
        '', 20P,  '']
    burnable_absorber_position:
      [  0.0, 7.224,   0.0,
       7.224,   0.0, 7.224,
         0.0, 7.224,   0.0]
    control_rod:
      max_num_steps: 230
      step_size: 1.5875
      fully_withdrawn_height: 371.658
      banks:
      - {name: D, bundle: 24C, position: 230}
      location_map:
        ['', '', '',
         '',  D, '',
         '', '', '']
 
state:
  system_pressure: 15.516
  moderator_temperature: 565
  fuel_temperature: 565
  boron_concentration: 1360

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.05

low_power_physic_tests:
  control_rod_worths_curve:
  - name: D
    boron_concentration: 1360
    steps:
    - {step: 0  , control_rod_position: [0  ]}
    - {step: 23 , control_rod_position: [23 ]}
    - {step: 46 , control_rod_position: [46 ]}
    - {step: 69 , control_rod_position: [69 ]}
    - {step: 92 , control_rod_position: [92 ]}
    - {step: 115, control_rod_position: [115]}
    - {step: 138, control_rod_position: [138]}
    - {step: 161, control_rod_position: [161]}
    - {step: 184, control_rod_position: [184]}
    - {step: 207, control_rod_position: [207]}
    - {step: 230, control_rod_position: [230]}

3.26. VERA_5A_2D

materials:
- name: Fuel_211
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57591E-02, 4.04814E-06, 4.88801E-04, 2.23756E-06, 2.23844E-02]
- name: Fuel_2619
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57617E-02, 5.09503E-06, 6.06733E-04, 2.76809E-06, 2.22663E-02]
- name: Fuel_311
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: Pyrex
  elements: [B-10b, B-11, O-nat, Si-nat]
  number_densities: [9.63266E-04, 3.90172E-03, 4.67761E-02, 1.9732607e-02]
- name: AIC
  elements: [Ag-nat, Cd-nat, In-nat]
  number_densities: [4.55562e-02, 2.7321858e-03, 8.024762e-03]
- name: SS304
  elements: [C-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [3.20895E-04, 1.7153747e-03, 6.99938E-05, 1.7604461e-02, 1.75387E-03, 5.8986522e-02, 7.797858e-03]
- name: CS508
  elements: [C-nat, Fe-nat]
  number_densities: [3.93598E-03, 8.380507e-02]

geometries:
  structures:
  - &fuel_pin
    name: F31
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_311, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - <<: *fuel_pin
    name: F21
    regions:
    - {material: Fuel_211, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
  - <<: *fuel_pin
    name: F26
    regions:
    - {material: Fuel_2619, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.32, 0.38]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}
  - name: AIC_pin
    primitives:
    - {type: CIRCLE, radius: 0.382}
    - {type: CIRCLE, radius: 0.386}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: AIC, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: SS304, space: 3-2}
  - name: Pyrex_pin
    primitives:
    - {type: CIRCLE, radius: 0.214}
    - {type: CIRCLE, radius: 0.231}
    - {type: CIRCLE, radius: 0.241}
    - {type: CIRCLE, radius: 0.427}
    - {type: CIRCLE, radius: 0.437}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: Helium, space: '1'}
    - {material: SS304, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: Pyrex, space: 4-3}
    - {material: Helium, space: 5-4}
    - {material: SS304, space: 6-5}
  - name: Reflector
    primitives:
    - {type: CIRCLE, radius: 187.96}
    - {type: CIRCLE, radius: 193.68}
    - {type: CIRCLE, radius: 194.64}
    - {type: CIRCLE, radius: 201.63}
    - {type: CIRCLE, radius: 219.15}
    - {type: CIRCLE, radius: 219.71}
    - {type: CIRCLE, radius: 241.70}
    - type: POLYGON
      vertexes:
      - {x:    0.0,    y:    0.0   }
      - {x:  262.3859, y:  145.4429}
      - {x:  145.4429, y:  262.3859}
    - type: POLYGON
      vertexes:
      - {x:    0.0,    y:    0.0   }
      - {x: -262.3859, y:  145.4429}
      - {x: -145.4429, y:  262.3859}
    - type: POLYGON
      vertexes:
      - {x:    0.0,    y:    0.0   }
      - {x:  262.3859, y: -145.4429}
      - {x:  145.4429, y: -262.3859}
    - type: POLYGON
      vertexes:
      - {x:    0.0,    y:    0.0   }
      - {x: -262.3859, y: -145.4429}
      - {x: -145.4429, y: -262.3859}
    regions:
    - {material: SS304, space: 2-1, tag: Core_Barrel}
    - {material: SS304, space: (4-3)&(8|9|10|11), tag: Neutron_Shield_Panel}
    - {material: SS304, space: 6-5, tag: Pressure_Vessel_Liner}
    - {material: CS508, space: 7-6, tag: Pressure_Vessel}

  baffles:
  - name: Baffle
    regions:
    - {thickness: 0.19, material: MOD}
    - {thickness: 2.85, material: SS304}

  lattices:
  - name: L21
    cell_map:
      [F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,F21,F21,F21,
       F21,F21,F21, GT,F21,F21,F21,F21,F21,F21,F21,F21,F21, GT,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21, GT,F21,F21, GT,F21,F21, IT,F21,F21, GT,F21,F21, GT,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21, GT,F21,F21,F21,F21,F21,F21,F21,F21,F21, GT,F21,F21,F21,
       F21,F21,F21,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21]
  - name: L26
    cell_map:
      [F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,F26,F26,F26,
       F26,F26,F26, GT,F26,F26,F26,F26,F26,F26,F26,F26,F26, GT,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26, GT,F26,F26, GT,F26,F26, IT,F26,F26, GT,F26,F26, GT,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26, GT,F26,F26,F26,F26,F26,F26,F26,F26,F26, GT,F26,F26,F26,
       F26,F26,F26,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26]
  - name: L31
    cell_map:
      [F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, IT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31]

  assemblies:
  - name: A21
    axial: 
    - {slice: L21, height: 1.0}
  - name: A26
    axial: 
    - {slice: L26, height: 1.0}
  - name: A31
    axial: 
    - {slice: L31, height: 1.0}

  inserted_rods:
  - name: PR
    axial:
    - {slice: Pyrex_pin, height: 10.0}

  burnable_absorber_bundle:
  - name: 8P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', PR, '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', PR, '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
  - name: 12P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
  - name: 16P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
  - name: 20P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', PR, '', '', '', '', '', PR, '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
  - name: 24P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', PR, '', '', PR, '', '', PR, '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', PR, '', '', '', '', '', PR, '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', PR, '', '', PR, '', '', PR, '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
 
  core:
    name: VERA_5A_2D
    type: SQUARE
    symmetry: 8
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 10.0
    assembly_map: 
      [ '',  '',  '',  '', A31, A31, A31, A31, A31, A31, A31,  '',  '',  '',  '',
        '',  '', A31, A31, A31, A21, A31, A21, A31, A21, A31, A31, A31,  '',  '',
        '', A31, A31, A26, A21, A26, A21, A26, A21, A26, A21, A26, A31, A31,  '',
        '', A31, A26, A26, A26, A21, A26, A21, A26, A21, A26, A26, A26, A31,  '',
       A31, A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31, A31,
       A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31,
       A31, A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31, A31,
       A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31,
       A31, A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31, A31,
       A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31,
       A31, A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31, A31,
        '', A31, A26, A26, A26, A21, A26, A21, A26, A21, A26, A26, A26, A31,  '',
        '', A31, A31, A26, A21, A26, A21, A26, A21, A26, A21, A26, A31, A31,  '',
        '',  '', A31, A31, A31, A21, A31, A21, A31, A21, A31, A31, A31,  '',  '',
        '',  '',  '',  '', A31, A31, A31, A31, A31, A31, A31,  '',  '',  '',  '']
    burnable_absorber_map:
      [ '',  '',  '',  '',  '',  8P,  '', 12P,  '',  8P,  '',  '',  '',  '',  '',
        '',  '',  '',  '', 16P,  '', 24P,  '', 24P,  '', 16P,  '',  '',  '',  '',
        '',  '', 12P, 24P,  '', 16P,  '', 20P,  '', 16P,  '', 24P, 12P,  '',  '',
        '',  '', 24P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 24P,  '',  '',
        '', 16P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 16P,  '',
        8P,  '', 16P,  '', 20P,  '', 24P,  '', 24P,  '', 20P,  '', 16P,  '',  8P,
        '', 24P,  '', 20P,  '', 24P,  '', 20P,  '', 24P,  '', 20P,  '', 24P,  '',
       12P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 12P,
        '', 24P,  '', 20P,  '', 24P,  '', 20P,  '', 24P,  '', 20P,  '', 24P,  '',
        8P,  '', 16P,  '', 20P,  '', 24P,  '', 24P,  '', 20P,  '', 16P,  '',  8P,
        '', 16P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 16P,  '',
        '',  '', 24P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 24P,  '',  '',
        '',  '', 12P, 24P,  '', 16P,  '', 20P,  '', 16P,  '', 24P, 12P,  '',  '',
        '',  '',  '',  '', 16P,  '', 24P,  '', 24P,  '', 16P,  '',  '',  '',  '',
        '',  '',  '',  '',  '',  8P,  '', 12P,  '',  8P,  '',  '',  '',  '',  '']
    baffle:
    - {slice: Baffle, height: 1.0}
    reflector_middle:
    - {slice: Reflector, height: 1.0}
    top_boundary_condition: REFLECTIVE
    bottom_boundary_condition: REFLECTIVE
 
state:
  system_pressure: 15.516
  moderator_temperature: 565
  fuel_temperature: 565
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.05

to_openmc:
  openmc_settings:
    batches: 1000
    inactive: 500
    particles: 100000

3.27. VERA_5B_2D

materials:
- name: Fuel_211
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57591E-02, 4.04814E-06, 4.88801E-04, 2.23756E-06, 2.23844E-02]
- name: Fuel_2619
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57617E-02, 5.09503E-06, 6.06733E-04, 2.76809E-06, 2.22663E-02]
- name: Fuel_311
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: Pyrex
  elements: [B-10b, B-11, O-nat, Si-nat]
  number_densities: [9.63266E-04, 3.90172E-03, 4.67761E-02, 1.9732607e-02]
- name: AIC
  elements: [Ag-nat, Cd-nat, In-nat]
  number_densities: [4.55562e-02, 2.7321858e-03, 8.024762e-03]
- name: SS304
  elements: [C-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [3.20895E-04, 1.7153747e-03, 6.99938E-05, 1.7604461e-02, 1.75387E-03, 5.8986522e-02, 7.797858e-03]
- name: CS508
  elements: [C-nat, Fe-nat]
  number_densities: [3.93598E-03, 8.380507e-02]

geometries:
  structures:
  - &fuel_pin
    name: F31
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_311, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - <<: *fuel_pin
    name: F21
    regions:
    - {material: Fuel_211, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
  - <<: *fuel_pin
    name: F26
    regions:
    - {material: Fuel_2619, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.32, 0.38]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}
  - name: AIC_pin
    primitives:
    - {type: CIRCLE, radius: 0.382}
    - {type: CIRCLE, radius: 0.386}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: AIC, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: SS304, space: 3-2}
  - name: Pyrex_pin
    primitives:
    - {type: CIRCLE, radius: 0.214}
    - {type: CIRCLE, radius: 0.231}
    - {type: CIRCLE, radius: 0.241}
    - {type: CIRCLE, radius: 0.427}
    - {type: CIRCLE, radius: 0.437}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: Helium, space: '1'}
    - {material: SS304, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: Pyrex, space: 4-3}
    - {material: Helium, space: 5-4}
    - {material: SS304, space: 6-5}
  - name: Reflector
    primitives:
    - {type: CIRCLE, radius: 187.96}
    - {type: CIRCLE, radius: 193.68}
    - {type: CIRCLE, radius: 194.64}
    - {type: CIRCLE, radius: 201.63}
    - {type: CIRCLE, radius: 219.15}
    - {type: CIRCLE, radius: 219.71}
    - {type: CIRCLE, radius: 241.70}
    - type: POLYGON
      vertexes:
      - {x:    0.0,    y:    0.0   }
      - {x:  262.3859, y:  145.4429}
      - {x:  145.4429, y:  262.3859}
    - type: POLYGON
      vertexes:
      - {x:    0.0,    y:    0.0   }
      - {x: -262.3859, y:  145.4429}
      - {x: -145.4429, y:  262.3859}
    - type: POLYGON
      vertexes:
      - {x:    0.0,    y:    0.0   }
      - {x:  262.3859, y: -145.4429}
      - {x:  145.4429, y: -262.3859}
    - type: POLYGON
      vertexes:
      - {x:    0.0,    y:    0.0   }
      - {x: -262.3859, y: -145.4429}
      - {x: -145.4429, y: -262.3859}
    regions:
    - {material: SS304, space: 2-1, tag: Core_Barrel}
    - {material: SS304, space: (4-3)&(8|9|10|11), tag: Neutron_Shield_Panel}
    - {material: SS304, space: 6-5, tag: Pressure_Vessel_Liner}
    - {material: CS508, space: 7-6, tag: Pressure_Vessel}

  baffles:
  - name: Baffle
    regions:
    - {thickness: 0.19, material: MOD}
    - {thickness: 2.85, material: SS304}

  lattices:
  - name: L21
    cell_map:
      [F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,F21,F21,F21,
       F21,F21,F21, GT,F21,F21,F21,F21,F21,F21,F21,F21,F21, GT,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21, GT,F21,F21, GT,F21,F21, IT,F21,F21, GT,F21,F21, GT,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21, GT,F21,F21,F21,F21,F21,F21,F21,F21,F21, GT,F21,F21,F21,
       F21,F21,F21,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21]
  - name: L26
    cell_map:
      [F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,F26,F26,F26,
       F26,F26,F26, GT,F26,F26,F26,F26,F26,F26,F26,F26,F26, GT,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26, GT,F26,F26, GT,F26,F26, IT,F26,F26, GT,F26,F26, GT,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26, GT,F26,F26,F26,F26,F26,F26,F26,F26,F26, GT,F26,F26,F26,
       F26,F26,F26,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26]
  - name: L31
    cell_map:
      [F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, IT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31]

  assemblies:
  - name: A21
    axial: 
    - {slice: L21, height: 10.0}
  - name: A26
    axial: 
    - {slice: L26, height: 10.0}
  - name: A31
    axial: 
    - {slice: L31, height: 10.0}

  inserted_rods:
  - name: PR
    axial:
    - {slice: Pyrex_pin, height: 10.0}
  - name: CR
    axial:
    - {slice: AIC_pin, height: 10.0}

  burnable_absorber_bundle:
  - name: 8P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', PR, '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', PR, '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
  - name: 12P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
  - name: 16P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
  - name: 20P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', PR, '', '', '', '', '', PR, '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
  - name: 24P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', PR, '', '', PR, '', '', PR, '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', PR, '', '', '', '', '', PR, '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', PR, '', '', PR, '', '', PR, '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']

  control_rod_bundle:
  - name: 24C
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', CR, '', '', CR, '', '', CR, '', '', '', '', '',
        '', '', '', CR, '', '', '', '', '', '', '', '', '', CR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', CR, '', '', CR, '', '', CR, '', '', CR, '', '', CR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', CR, '', '', CR, '', '', '', '', '', CR, '', '', CR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', CR, '', '', CR, '', '', CR, '', '', CR, '', '', CR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', CR, '', '', '', '', '', '', '', '', '', CR, '', '', '',
        '', '', '', '', '', CR, '', '', CR, '', '', CR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']

  core:
    name: VERA_5B_2D
    type: SQUARE
    symmetry: 8
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 10.0
    assembly_map: 
      [ '',  '',  '',  '', A31, A31, A31, A31, A31, A31, A31,  '',  '',  '',  '',
        '',  '', A31, A31, A31, A21, A31, A21, A31, A21, A31, A31, A31,  '',  '',
        '', A31, A31, A26, A21, A26, A21, A26, A21, A26, A21, A26, A31, A31,  '',
        '', A31, A26, A26, A26, A21, A26, A21, A26, A21, A26, A26, A26, A31,  '',
       A31, A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31, A31,
       A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31,
       A31, A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31, A31,
       A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31,
       A31, A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31, A31,
       A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31,
       A31, A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31, A31,
        '', A31, A26, A26, A26, A21, A26, A21, A26, A21, A26, A26, A26, A31,  '',
        '', A31, A31, A26, A21, A26, A21, A26, A21, A26, A21, A26, A31, A31,  '',
        '',  '', A31, A31, A31, A21, A31, A21, A31, A21, A31, A31, A31,  '',  '',
        '',  '',  '',  '', A31, A31, A31, A31, A31, A31, A31,  '',  '',  '',  '']
    burnable_absorber_map:
      [ '',  '',  '',  '',  '',  8P,  '', 12P,  '',  8P,  '',  '',  '',  '',  '',
        '',  '',  '',  '', 16P,  '', 24P,  '', 24P,  '', 16P,  '',  '',  '',  '',
        '',  '', 12P, 24P,  '', 16P,  '', 20P,  '', 16P,  '', 24P, 12P,  '',  '',
        '',  '', 24P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 24P,  '',  '',
        '', 16P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 16P,  '',
        8P,  '', 16P,  '', 20P,  '', 24P,  '', 24P,  '', 20P,  '', 16P,  '',  8P,
        '', 24P,  '', 20P,  '', 24P,  '', 20P,  '', 24P,  '', 20P,  '', 24P,  '',
       12P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 12P,
        '', 24P,  '', 20P,  '', 24P,  '', 20P,  '', 24P,  '', 20P,  '', 24P,  '',
        8P,  '', 16P,  '', 20P,  '', 24P,  '', 24P,  '', 20P,  '', 16P,  '',  8P,
        '', 16P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 16P,  '',
        '',  '', 24P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 24P,  '',  '',
        '',  '', 12P, 24P,  '', 16P,  '', 20P,  '', 16P,  '', 24P, 12P,  '',  '',
        '',  '',  '',  '', 16P,  '', 24P,  '', 24P,  '', 16P,  '',  '',  '',  '',
        '',  '',  '',  '',  '',  8P,  '', 12P,  '',  8P,  '',  '',  '',  '',  '']
    control_rod_map:
      ['', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '',24C, '', '', '',24C, '', '', '',24C, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '',24C, '', '', '',24C, '', '', '',24C, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '',24C, '', '', '',24C, '', '', '',24C, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
    baffle:
    - {slice: Baffle, height: 10.0}
    reflector_middle:
    - {slice: Reflector, height: 10.0}
    top_boundary_condition: REFLECTIVE
    bottom_boundary_condition: REFLECTIVE
state:
  system_pressure: 15.516
  moderator_temperature: 565
  fuel_temperature: 565
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.05

to_openmc:
  openmc_settings:
    batches: 1000
    inactive: 500
    particles: 100000

3.28. VERA_5C_2D

materials:
- name: Fuel_211
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57591E-02, 4.04814E-06, 4.88801E-04, 2.23756E-06, 2.23844E-02]
- name: Fuel_2619
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57617E-02, 5.09503E-06, 6.06733E-04, 2.76809E-06, 2.22663E-02]
- name: Fuel_311
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: Pyrex
  elements: [B-10b, B-11, O-nat, Si-nat]
  number_densities: [9.63266E-04, 3.90172E-03, 4.67761E-02, 1.9732607e-02]
- name: AIC
  elements: [Ag-nat, Cd-nat, In-nat]
  number_densities: [4.55562e-02, 2.7321858e-03, 8.024762e-03]
- name: B4C
  elements: [B-nat, C-nat]
  number_densities: [7.6728E-02, 1.91820E-02]
- name: SS304
  elements: [C-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [3.20895E-04, 1.7153747e-03, 6.99938E-05, 1.7604461e-02, 1.75387E-03, 5.8986522e-02, 7.797858e-03]
- name: CS508
  elements: [C-nat, Fe-nat]
  number_densities: [3.93598E-03, 8.380507e-02]

geometries:
  structures:
  - &fuel_pin
    name: F31
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_311, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - <<: *fuel_pin
    name: F21
    regions:
    - {material: Fuel_211, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
  - <<: *fuel_pin
    name: F26
    regions:
    - {material: Fuel_2619, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.32, 0.38]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}
  - name: AIC_pin
    primitives:
    - {type: CIRCLE, radius: 0.382}
    - {type: CIRCLE, radius: 0.386}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: AIC, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: SS304, space: 3-2}
  - name: B4C_pin
    primitives:
    - {type: CIRCLE, radius: 0.373}
    - {type: CIRCLE, radius: 0.386}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: B4C, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: SS304, space: 3-2}
  - name: Pyrex_pin
    primitives:
    - {type: CIRCLE, radius: 0.214}
    - {type: CIRCLE, radius: 0.231}
    - {type: CIRCLE, radius: 0.241}
    - {type: CIRCLE, radius: 0.427}
    - {type: CIRCLE, radius: 0.437}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: Helium, space: '1'}
    - {material: SS304, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: Pyrex, space: 4-3}
    - {material: Helium, space: 5-4}
    - {material: SS304, space: 6-5}
  - name: Reflector
    primitives:
    - {type: CIRCLE, radius: 187.96}
    - {type: CIRCLE, radius: 193.68}
    - {type: CIRCLE, radius: 194.64}
    - {type: CIRCLE, radius: 201.63}
    - {type: CIRCLE, radius: 219.15}
    - {type: CIRCLE, radius: 219.71}
    - {type: CIRCLE, radius: 241.70}
    - type: POLYGON
      vertexes:
      - {x:    0.0,    y:    0.0   }
      - {x:  262.3859, y:  145.4429}
      - {x:  145.4429, y:  262.3859}
    - type: POLYGON
      vertexes:
      - {x:    0.0,    y:    0.0   }
      - {x: -262.3859, y:  145.4429}
      - {x: -145.4429, y:  262.3859}
    - type: POLYGON
      vertexes:
      - {x:    0.0,    y:    0.0   }
      - {x:  262.3859, y: -145.4429}
      - {x:  145.4429, y: -262.3859}
    - type: POLYGON
      vertexes:
      - {x:    0.0,    y:    0.0   }
      - {x: -262.3859, y: -145.4429}
      - {x: -145.4429, y: -262.3859}
    regions:
    - {material: SS304, space: 2-1, tag: Core_Barrel}
    - {material: SS304, space: (4-3)&(8|9|10|11), tag: Neutron_Shield_Panel}
    - {material: SS304, space: 6-5, tag: Pressure_Vessel_Liner}
    - {material: CS508, space: 7-6, tag: Pressure_Vessel}

  baffles:
  - name: Baffle
    regions:
    - {thickness: 0.19, material: MOD}
    - {thickness: 2.85, material: SS304}

  lattices:
  - name: L21
    cell_map:
      [F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,F21,F21,F21,
       F21,F21,F21, GT,F21,F21,F21,F21,F21,F21,F21,F21,F21, GT,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21, GT,F21,F21, GT,F21,F21, IT,F21,F21, GT,F21,F21, GT,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21, GT,F21,F21,F21,F21,F21,F21,F21,F21,F21, GT,F21,F21,F21,
       F21,F21,F21,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21]
  - name: L26
    cell_map:
      [F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,F26,F26,F26,
       F26,F26,F26, GT,F26,F26,F26,F26,F26,F26,F26,F26,F26, GT,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26, GT,F26,F26, GT,F26,F26, IT,F26,F26, GT,F26,F26, GT,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26, GT,F26,F26,F26,F26,F26,F26,F26,F26,F26, GT,F26,F26,F26,
       F26,F26,F26,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26]
  - name: L31
    cell_map:
      [F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, IT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31]

  assemblies:
  - name: A21
    axial: 
    - {slice: L21, height: 1.0}
  - name: A26
    axial: 
    - {slice: L26, height: 1.0}
  - name: A31
    axial: 
    - {slice: L31, height: 1.0}

  inserted_rods:
  - name: PR
    axial:
    - {slice: Pyrex_pin, height: 1.0}
  - name: CR
    axial:
    - {slice: B4C_pin, height: 1.0}

  burnable_absorber_bundle:
  - name: 8P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', PR, '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', PR, '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
  - name: 12P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
  - name: 16P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
  - name: 20P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', PR, '', '', '', '', '', PR, '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
  - name: 24P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', PR, '', '', PR, '', '', PR, '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', PR, '', '', '', '', '', PR, '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', PR, '', '', PR, '', '', PR, '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']

  control_rod_bundle:
  - name: 24C
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', CR, '', '', CR, '', '', CR, '', '', '', '', '',
        '', '', '', CR, '', '', '', '', '', '', '', '', '', CR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', CR, '', '', CR, '', '', CR, '', '', CR, '', '', CR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', CR, '', '', CR, '', '', '', '', '', CR, '', '', CR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', CR, '', '', CR, '', '', CR, '', '', CR, '', '', CR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', CR, '', '', '', '', '', '', '', '', '', CR, '', '', '',
        '', '', '', '', '', CR, '', '', CR, '', '', CR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']

  core:
    name: VERA_5C_2D
    type: SQUARE
    symmetry: 8
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 10.0
    assembly_map: 
      [ '',  '',  '',  '', A31, A31, A31, A31, A31, A31, A31,  '',  '',  '',  '',
        '',  '', A31, A31, A31, A21, A31, A21, A31, A21, A31, A31, A31,  '',  '',
        '', A31, A31, A26, A21, A26, A21, A26, A21, A26, A21, A26, A31, A31,  '',
        '', A31, A26, A26, A26, A21, A26, A21, A26, A21, A26, A26, A26, A31,  '',
       A31, A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31, A31,
       A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31,
       A31, A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31, A31,
       A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31,
       A31, A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31, A31,
       A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31,
       A31, A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31, A31,
        '', A31, A26, A26, A26, A21, A26, A21, A26, A21, A26, A26, A26, A31,  '',
        '', A31, A31, A26, A21, A26, A21, A26, A21, A26, A21, A26, A31, A31,  '',
        '',  '', A31, A31, A31, A21, A31, A21, A31, A21, A31, A31, A31,  '',  '',
        '',  '',  '',  '', A31, A31, A31, A31, A31, A31, A31,  '',  '',  '',  '']
    burnable_absorber_map:
      [ '',  '',  '',  '',  '',  8P,  '', 12P,  '',  8P,  '',  '',  '',  '',  '',
        '',  '',  '',  '', 16P,  '', 24P,  '', 24P,  '', 16P,  '',  '',  '',  '',
        '',  '', 12P, 24P,  '', 16P,  '', 20P,  '', 16P,  '', 24P, 12P,  '',  '',
        '',  '', 24P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 24P,  '',  '',
        '', 16P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 16P,  '',
        8P,  '', 16P,  '', 20P,  '', 24P,  '', 24P,  '', 20P,  '', 16P,  '',  8P,
        '', 24P,  '', 20P,  '', 24P,  '', 20P,  '', 24P,  '', 20P,  '', 24P,  '',
       12P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 12P,
        '', 24P,  '', 20P,  '', 24P,  '', 20P,  '', 24P,  '', 20P,  '', 24P,  '',
        8P,  '', 16P,  '', 20P,  '', 24P,  '', 24P,  '', 20P,  '', 16P,  '',  8P,
        '', 16P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 16P,  '',
        '',  '', 24P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 24P,  '',  '',
        '',  '', 12P, 24P,  '', 16P,  '', 20P,  '', 16P,  '', 24P, 12P,  '',  '',
        '',  '',  '',  '', 16P,  '', 24P,  '', 24P,  '', 16P,  '',  '',  '',  '',
        '',  '',  '',  '',  '',  8P,  '', 12P,  '',  8P,  '',  '',  '',  '',  '']
    control_rod_map:
      [ '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',
        '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',
        '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',
        '',  '',  '', 24C,  '',  '',  '', 24C,  '',  '',  '', 24C,  '',  '',  '',
        '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',
        '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',
        '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',
        '',  '',  '', 24C,  '',  '',  '', 24C,  '',  '',  '', 24C,  '',  '',  '',
        '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',
        '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',
        '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',
        '',  '',  '', 24C,  '',  '',  '', 24C,  '',  '',  '', 24C,  '',  '',  '',
        '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',
        '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',
        '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '',  '']
    baffle:
    - {slice: Baffle, height: 1.0}
    reflector_middle:
    - {slice: Reflector, height: 1.0}
    top_boundary_condition: REFLECTIVE
    bottom_boundary_condition: REFLECTIVE
 
state:
  system_pressure: 15.516
  moderator_temperature: 565
  fuel_temperature: 565
  boron_concentration: 1300

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.05

to_openmc:
  openmc_settings:
    batches: 1000
    inactive: 500
    particles: 100000

3.29. VERA_5

materials:
- name: Fuel_211
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57591E-02, 4.04814E-06, 4.88801E-04, 2.23756E-06, 2.23844E-02]
- name: Fuel_2619
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57617E-02, 5.09503E-06, 6.06733E-04, 2.76809E-06, 2.22663E-02]
- name: Fuel_311
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: Pyrex
  elements: [B-10b, B-11, O-nat, Si-nat]
  number_densities: [9.63266E-04, 3.90172E-03, 4.67761E-02, 1.9732607e-02]
- name: AIC
  elements: [Ag-nat, Cd-nat, In-nat]
  number_densities: [4.55562e-02, 2.7321858e-03, 8.024762e-03]
- name: B4C
  elements: [B-nat, C-nat]
  number_densities: [7.6728E-02, 1.91820E-02]
- name: SS304
  elements: [C-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [3.20895E-04, 1.7153747e-03, 6.99938E-05, 1.7604461e-02, 1.75387E-03, 5.8986522e-02, 7.797858e-03]
- name: CS508
  elements: [C-nat, Fe-nat]
  number_densities: [3.93598E-03, 8.380507e-02]
- name: Inconel
  elements: [Si-nat, Ti-nat, Cr-nat, Fe-nat, Ni-nat]
  number_densities: [4.390283e-03, 2.575975e-03, 1.42283623e-02, 6.182259e-03, 6.1343581e-02]
- name: Top_Nozzle
  elements: [H-H2O, B-nat, C-nat, O-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [4.01264E-02, 3.920188e-05, 6.14458E-05, 2.00632E-02, 3.280602e-04, 1.33861E-05, 3.3668141e-03, 3.35423E-04, 1.12810335e-02, 1.4913264e-03]
- name: Bottom_Nozzle
  elements: [H-H2O, B-nat, C-nat, O-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [3.57707E-02, 3.48628e-05, 8.96008E-05, 1.78853E-02, 4.790789e-04, 1.95482E-05, 4.916672e-03, 4.89830E-04, 1.647405189e-02, 2.1778303e-03]
- name: Core_Plates
  elements: [H-H2O, B-nat, C-nat, O-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [2.48145E-02, 2.410736e-05, 1.60447E-04, 1.24072E-02, 8.573762e-04, 3.49842E-05, 8.799055e-03, 8.76618E-04, 2.94825369e-02, 1.2442082e-03]

geometries:
  structures:
  - &fuel_pin
    name: F31
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_311, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - <<: *fuel_pin
    name: F21
    regions:
    - {material: Fuel_211, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
  - <<: *fuel_pin
    name: F26
    regions:
    - {material: Fuel_2619, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
  - name: PLG
    primitives:
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Zircaloy-4, space: '1'}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: CRD_plug
    primitives:
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: SS304, space: '1'}
  - name: PLE
    primitives:
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Helium, space: '1'}
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.32, 0.38]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}
  - name: IT_pin
    primitives:
    - {type: CIRCLE, radius: 0.258}
    - {type: CIRCLE, radius: 0.382}
    regions:
    - {material: AIR, space: '1'}
    - {material: SS304, space: 2-1}
  - name: AIC_pin
    primitives:
    - {type: CIRCLE, radius: 0.373}
    - {type: CIRCLE, radius: 0.382}
    - {type: CIRCLE, radius: 0.386}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: AIC, space: '1'}
    - {material: AIC, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: SS304, space: 4-3}
  - name: B4C_pin
    primitives:
    - {type: CIRCLE, radius: 0.373}
    - {type: CIRCLE, radius: 0.382}
    - {type: CIRCLE, radius: 0.386}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: B4C, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: SS304, space: 4-3}
  - name: CRD_plenum
    primitives:
    - {type: CIRCLE, radius: 0.373}
    - {type: CIRCLE, radius: 0.382}
    - {type: CIRCLE, radius: 0.386}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: Helium, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: SS304, space: 4-3}
  - name: Pyrex_poison
    primitives:
    - {type: CIRCLE, radius: 0.214}
    - {type: CIRCLE, radius: 0.231}
    - {type: CIRCLE, radius: 0.241}
    - {type: CIRCLE, radius: 0.427}
    - {type: CIRCLE, radius: 0.437}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: Helium, space: '1'}
    - {material: SS304, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: Pyrex, space: 4-3}
    - {material: Helium, space: 5-4}
    - {material: SS304, space: 6-5}
  - name: Pyrex_plug
    primitives:
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: SS304, space: '1'}
  - name: Pyrex_plenum
    primitives:
    - {type: CIRCLE, radius: 0.214}
    - {type: CIRCLE, radius: 0.231}
    - {type: CIRCLE, radius: 0.437}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: Helium, space: '1'}
    - {material: SS304, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: SS304, space: 4-3}
  - &grid 
    name: GRD0
    primitives:
    - type: POLYGON
      vertexes:
      - {x: -0.60545, y: -0.60545}
      - {x:  0.60545, y: -0.60545}
      - {x:  0.60545, y:  0.60545}
      - {x: -0.60545, y:  0.60545}
    - type: POLYGON
      vertexes:
      - {x: -0.63000, y: -0.63000}
      - {x:  0.63000, y: -0.63000}
      - {x:  0.63000, y:  0.63000}
      - {x: -0.63000, y:  0.63000}
    regions:
    - {material: Zircaloy-4, space: 2-1}
  - <<: *grid
    name: GRD1
    regions:
    - {material: Inconel, space: 2-1}
  - name: ref_middle
    primitives:
    - {type: CIRCLE, radius: 187.96}
    - {type: CIRCLE, radius: 193.68}
    - {type: CIRCLE, radius: 194.64}
    - {type: CIRCLE, radius: 201.63}
    - {type: CIRCLE, radius: 219.15}
    - {type: CIRCLE, radius: 219.71}
    - {type: CIRCLE, radius: 241.70}
    - type: POLYGON
      vertexes:
      - {x:    0.0,    y:    0.0   }
      - {x:  262.3859, y:  145.4429}
      - {x:  145.4429, y:  262.3859}
    - type: POLYGON
      vertexes:
      - {x:    0.0,    y:    0.0   }
      - {x: -262.3859, y:  145.4429}
      - {x: -145.4429, y:  262.3859}
    - type: POLYGON
      vertexes:
      - {x:    0.0,    y:    0.0   }
      - {x:  262.3859, y: -145.4429}
      - {x:  145.4429, y: -262.3859}
    - type: POLYGON
      vertexes:
      - {x:    0.0,    y:    0.0   }
      - {x: -262.3859, y: -145.4429}
      - {x: -145.4429, y: -262.3859}
    regions:
    - {material: SS304, space: 2-1, tag: Core_Barrel}
    - {material: SS304, space: (4-3)&(8|9|10|11), tag: Neutron_Shield_Panel}
    - {material: SS304, space: 6-5, tag: Pressure_Vessel_Liner}
    - {material: CS508, space: 7-6, tag: Pressure_Vessel}
  - &ref_top_nozzle
    name: ref_top_nozzle
    primitives:
    - {type: CIRCLE, radius: 182.00}
    - {type: CIRCLE, radius: 187.96}
    - {type: CIRCLE, radius: 193.68}
    - {type: CIRCLE, radius: 219.15}
    - {type: CIRCLE, radius: 219.71}
    - {type: CIRCLE, radius: 241.70}
    regions:
    - {material: Top_Nozzle, space: '1'}
    - {material: SS304, space: 3-2}
    - {material: SS304, space: 5-4}
    - {material: CS508, space: 6-5}
  - <<: *ref_top_nozzle
    name: ref_bottom_nozzle
    regions:
    - {material: Bottom_Nozzle, space: '1'}
    - {material: SS304, space: 3-2}
    - {material: SS304, space: 5-4}
    - {material: CS508, space: 6-5}
  - <<: *ref_top_nozzle
    name: ref_core_plates
    regions:
    - {material: Core_Plates, space: '1'}
    - {material: SS304, space: 3-2}
    - {material: SS304, space: 5-4}
    - {material: CS508, space: 6-5}
  - <<: *ref_top_nozzle
    name: ref_mod
    regions:
    - {material: MOD, space: '1'}
    - {material: SS304, space: 3-2}
    - {material: SS304, space: 5-4}
    - {material: CS508, space: 6-5}

  baffles:
  - name: Baffle
    regions:
    - {thickness: 0.19, material: MOD}
    - {thickness: 2.85, material: SS304}

  lattices:
  - name: L21
    cell_map:
      [F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,F21,F21,F21,
       F21,F21,F21, GT,F21,F21,F21,F21,F21,F21,F21,F21,F21, GT,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21, GT,F21,F21, GT,F21,F21, IT,F21,F21, GT,F21,F21, GT,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21, GT,F21,F21,F21,F21,F21,F21,F21,F21,F21, GT,F21,F21,F21,
       F21,F21,F21,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21]
  - name: L26
    cell_map:
      [F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,F26,F26,F26,
       F26,F26,F26, GT,F26,F26,F26,F26,F26,F26,F26,F26,F26, GT,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26, GT,F26,F26, GT,F26,F26, IT,F26,F26, GT,F26,F26, GT,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26, GT,F26,F26,F26,F26,F26,F26,F26,F26,F26, GT,F26,F26,F26,
       F26,F26,F26,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26]
  - name: L31
    cell_map:
      [F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, IT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31]
  - name: lattice_plug
    cell_map:
      [PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, IT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG]
  - name: lattice_plenum
    cell_map:
      [PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, IT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE]
  - name: gap_water
    cell_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', GT, '', '', GT, '', '', GT, '', '', '', '', '',
        '', '', '', GT, '', '', '', '', '', '', '', '', '', GT, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', GT, '', '', GT, '', '', IT, '', '', GT, '', '', GT, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', GT, '', '', '', '', '', '', '', '', '', GT, '', '', '',
        '', '', '', '', '', GT, '', '', GT, '', '', GT, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']

  grids:
  - name: intermediate_grid_spacer
    grid_map:
      [GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0]
  - name: end_grid_spacer
    grid_map:
      [GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1]

  assemblies:
  - &A31
    name: A31
    axial: 
    - {slice: gap_water, height: 4.228}
    - {slice: lattice_plug, height: 1.67}
    - {slice: L31, height: 365.76}
    - {slice: lattice_plenum, height: 16.0}
    - {slice: lattice_plug, height: 1.67}
    - {slice: gap_water, height: 2.129}
    grids:
    - {slice: end_grid_spacer, height: 3.866, position: 5.898}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 67.242}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 119.442}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 171.642}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 223.842}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 276.042}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 328.242}
    - {slice: end_grid_spacer, height: 3.866, position: 380.214}
  - <<: *A31
    name: A26
    axial: 
    - {slice: gap_water, height: 4.228}
    - {slice: lattice_plug, height: 1.67}
    - {slice: L26, height: 365.76}
    - {slice: lattice_plenum, height: 16.0}
    - {slice: lattice_plug, height: 1.67}
    - {slice: gap_water, height: 2.129}
  - <<: *A31
    name: A21
    axial: 
    - {slice: gap_water, height: 4.228}
    - {slice: lattice_plug, height: 1.67}
    - {slice: L21, height: 365.76}
    - {slice: lattice_plenum, height: 16.0}
    - {slice: lattice_plug, height: 1.67}
    - {slice: gap_water, height: 2.129}

  inserted_rods:
  - name: ITR
    axial:
    - {slice: IT_pin, height: 391.457}
  - name: PR
    axial:
    - {slice: Pyrex_plug, height: 2.54}
    - {slice: Pyrex_poison, height: 360.68}
    - {slice: Pyrex_plenum, height: 22.2}
  - name: CR
    axial:
    - {slice: AIC_pin, height: 101.6}
    - {slice: B4C_pin, height: 259.08}
    - {slice: CRD_plenum, height: 10.7}

  instrument_bundle:
  - name: 1IT
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '',ITR, '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']

  burnable_absorber_bundle:
  - name: 8P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', PR, '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', PR, '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
  - name: 12P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
  - name: 16P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
  - name: 20P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', PR, '', '', '', '', '', PR, '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
  - name: 24P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', PR, '', '', PR, '', '', PR, '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', PR, '', '', '', '', '', PR, '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', PR, '', '', PR, '', '', PR, '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']

  control_rod_bundle:
  - name: 24C
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', CR, '', '', CR, '', '', CR, '', '', '', '', '',
        '', '', '', CR, '', '', '', '', '', '', '', '', '', CR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', CR, '', '', CR, '', '', CR, '', '', CR, '', '', CR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', CR, '', '', CR, '', '', '', '', '', CR, '', '', CR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', CR, '', '', CR, '', '', CR, '', '', CR, '', '', CR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', CR, '', '', '', '', '', '', '', '', '', CR, '', '', '',
        '', '', '', '', '', CR, '', '', CR, '', '', CR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
 
  core:
    name: VERA_5
    type: SQUARE
    symmetry: 4
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 20.0
    assembly_map: 
      [ '',  '',  '',  '', A31, A31, A31, A31, A31, A31, A31,  '',  '',  '',  '',
        '',  '', A31, A31, A31, A21, A31, A21, A31, A21, A31, A31, A31,  '',  '',
        '', A31, A31, A26, A21, A26, A21, A26, A21, A26, A21, A26, A31, A31,  '',
        '', A31, A26, A26, A26, A21, A26, A21, A26, A21, A26, A26, A26, A31,  '',
       A31, A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31, A31,
       A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31,
       A31, A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31, A31,
       A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31,
       A31, A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31, A31,
       A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31,
       A31, A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31, A31,
        '', A31, A26, A26, A26, A21, A26, A21, A26, A21, A26, A26, A26, A31,  '',
        '', A31, A31, A26, A21, A26, A21, A26, A21, A26, A21, A26, A31, A31,  '',
        '',  '', A31, A31, A31, A21, A31, A21, A31, A21, A31, A31, A31,  '',  '',
        '',  '',  '',  '', A31, A31, A31, A31, A31, A31, A31,  '',  '',  '',  '']
    burnable_absorber_map:
      [ '',  '',  '',  '',  '',  8P,  '', 12P,  '',  8P,  '',  '',  '',  '',  '',
        '',  '',  '',  '', 16P,  '', 24P,  '', 24P,  '', 16P,  '',  '',  '',  '',
        '',  '', 12P, 24P,  '', 16P,  '', 20P,  '', 16P,  '', 24P, 12P,  '',  '',
        '',  '', 24P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 24P,  '',  '',
        '', 16P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 16P,  '',
        8P,  '', 16P,  '', 20P,  '', 24P,  '', 24P,  '', 20P,  '', 16P,  '',  8P,
        '', 24P,  '', 20P,  '', 24P,  '', 20P,  '', 24P,  '', 20P,  '', 24P,  '',
       12P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 12P,
        '', 24P,  '', 20P,  '', 24P,  '', 20P,  '', 24P,  '', 20P,  '', 24P,  '',
        8P,  '', 16P,  '', 20P,  '', 24P,  '', 24P,  '', 20P,  '', 16P,  '',  8P,
        '', 16P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 16P,  '',
        '',  '', 24P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 24P,  '',  '',
        '',  '', 12P, 24P,  '', 16P,  '', 20P,  '', 16P,  '', 24P, 12P,  '',  '',
        '',  '',  '',  '', 16P,  '', 24P,  '', 24P,  '', 16P,  '',  '',  '',  '',
        '',  '',  '',  '',  '',  8P,  '', 12P,  '',  8P,  '',  '',  '',  '',  '']
    burnable_absorber_position:
      [     0,     0,     0,     0,     0, 7.224,     0, 7.224,     0, 7.224,     0,     0,     0,     0,     0,
            0,     0,     0,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0,     0,     0,     0,
            0,     0, 7.224, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224, 7.224,     0,     0,
            0,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0,     0,
            0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0,
        7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,
            0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0,
        7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,
            0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0,
        7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,
            0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0,
            0,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0,     0,
            0,     0, 7.224, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224, 7.224,     0,     0,
            0,     0,     0,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0,     0,     0,     0,
            0,     0,     0,     0,     0, 7.224,     0, 7.224,     0, 7.224,     0,     0,     0,     0,     0]
    baffle:
    - {slice: Baffle, height: 391.457}
    reflector_middle:
    - {slice: ref_middle, height: 391.457}
    reflector_top:
    - {slice: ref_top_nozzle, height: 8.827}
    - {slice: ref_core_plates, height: 7.6}
    - {slice: ref_mod, height: 20}
    reflector_bottom:
    - {slice: ref_mod, height: 20}
    - {slice: ref_core_plates, height: 5.0}
    - {slice: ref_bottom_nozzle, height: 6.053}
    control_rod:
      max_num_steps: 230
      step_size: 1.5875
      fully_withdrawn_height: 371.658
      banks:
      - {name:  A, bundle: 24C, position: 230}
      - {name:  B, bundle: 24C, position: 230}
      - {name:  C, bundle: 24C, position: 230}
      - {name:  D, bundle: 24C, position: 230}
      - {name: SA, bundle: 24C, position: 230}
      - {name: SB, bundle: 24C, position: 230}
      - {name: SC, bundle: 24C, position: 230}
      - {name: SD, bundle: 24C, position: 230}
      location_map:
        [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
          '', '', '', SA, '',  B, '',  C, '',  B, '', SA, '', '', '',
          '', '', '', '', SD, '', SB, '', SB, '', SC, '', '', '', '',
          '', SA, '',  D, '', '', '',  D, '', '', '',  D, '', SA, '',
          '', '', SC, '',  A, '', '', '', '', '',  A, '', SD, '', '',
          '',  B, '', '', '',  C, '',  A, '',  C, '', '', '',  B, '',
          '', '', SB, '', '', '', '', '', '', '', '', '', SB, '', '',
          '',  C, '',  D, '',  A, '',  D, '',  A, '',  D, '',  C, '',
          '', '', SB, '', '', '', '', '', '', '', '', '', SB, '', '',
          '',  B, '', '', '',  C, '',  A, '',  C, '', '', '',  B, '',
          '', '', SD, '',  A, '', '', '', '', '',  A, '', SC, '', '',
          '', SA, '',  D, '', '', '',  D, '', '', '',  D, '', SA, '',
          '', '', '', '', SC, '', SB, '', SB, '', SD, '', '', '', '',
          '', '', '', SA, '',  B, '',  C, '',  B, '', SA, '', '', '',
          '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
    detector:
      reaction_id: 1003
      axial:
      - {height: 10.0, position:   5.898}
      - {height: 10.0, position:  15.898}
      - {height: 10.0, position:  25.898}
      - {height: 10.0, position:  35.898}
      - {height: 10.0, position:  45.898}
      - {height: 10.0, position:  55.898}
      - {height: 10.0, position:  65.898}
      - {height: 10.0, position:  75.898}
      - {height: 10.0, position:  85.898}
      - {height: 10.0, position:  95.898}
      - {height: 10.0, position: 105.898}
      - {height: 10.0, position: 115.898}
      - {height: 10.0, position: 125.898}
      - {height: 10.0, position: 135.898}
      - {height: 10.0, position: 145.898}
      - {height: 10.0, position: 155.898}
      - {height: 10.0, position: 165.898}
      - {height: 10.0, position: 175.898}
      - {height: 10.0, position: 185.898}
      - {height: 10.0, position: 195.898}
      - {height: 10.0, position: 205.898}
      - {height: 10.0, position: 215.898}
      - {height: 10.0, position: 225.898}
      - {height: 10.0, position: 235.898}
      - {height: 10.0, position: 245.898}
      - {height: 10.0, position: 255.898}
      - {height: 10.0, position: 265.898}
      - {height: 10.0, position: 275.898}
      - {height: 10.0, position: 285.898}
      - {height: 10.0, position: 295.898}
      - {height: 10.0, position: 305.898}
      - {height: 10.0, position: 315.898}
      - {height: 10.0, position: 325.898}
      - {height: 10.0, position: 335.898}
      - {height: 10.0, position: 345.898}
      - {height: 10.0, position: 355.898}
      radial:
        [ '',  '',  '',  '',  '',  '', 1IT,  '',  '', 1IT,  '',  '',  '',  '',  '',
          '',  '', 1IT,  '',  '', 1IT,  '', 1IT,  '',  '',  '',  '',  '',  '',  '',
          '',  '',  '',  '',  '',  '',  '', 1IT,  '', 1IT,  '', 1IT,  '', 1IT,  '',
          '', 1IT, 1IT,  '',  '',  '',  '', 1IT,  '',  '',  '',  '',  '',  '',  '',
          '',  '',  '',  '', 1IT,  '',  '',  '', 1IT,  '', 1IT,  '', 1IT,  '',  '',
         1IT,  '', 1IT,  '',  '', 1IT,  '', 1IT,  '',  '',  '',  '',  '', 1IT,  '',
          '',  '',  '', 1IT,  '',  '', 1IT,  '',  '', 1IT,  '',  '', 1IT,  '',  '',
         1IT,  '', 1IT,  '', 1IT,  '', 1IT,  '',  '', 1IT,  '', 1IT, 1IT, 1IT,  '',
          '', 1IT,  '',  '',  '',  '',  '',  '', 1IT,  '', 1IT,  '',  '',  '', 1IT,
          '',  '',  '',  '', 1IT,  '', 1IT,  '',  '',  '',  '', 1IT,  '',  '',  '',
         1IT,  '',  '',  '', 1IT,  '',  '', 1IT,  '',  '', 1IT,  '',  '',  '', 1IT,
          '',  '',  '',  '',  '', 1IT,  '',  '', 1IT,  '',  '', 1IT,  '',  '',  '',
          '',  '', 1IT,  '', 1IT,  '',  '', 1IT,  '',  '',  '',  '',  '', 1IT,  '',
          '',  '', 1IT,  '',  '',  '', 1IT,  '',  '', 1IT,  '', 1IT,  '',  '',  '',
          '',  '',  '',  '', 1IT,  '',  '', 1IT,  '',  '',  '',  '',  '',  '',  '']
 
state:
  system_pressure: 15.516
  inlet_temperature: 565
  boron_concentration: 1285

settings:
  power_iteration:
    fission_converge_criterion: 5.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.05

low_power_physic_tests:
  criticals:
  - {name: Initial, inlet_temperature: 565, boron_concentration: 1285, control_rod_position: [230, 230, 230, 167, 230, 230, 230, 230]}
  - {name: ARO,     inlet_temperature: 565, boron_concentration: 1291, control_rod_position: [230, 230, 230, 230, 230, 230, 230, 230]}
  - {name: Bank_A,  inlet_temperature: 565, boron_concentration: 1170, control_rod_position: [  0, 230, 230,  97, 230, 230, 230, 230]}
  - {name: Bank_B,  inlet_temperature: 565, boron_concentration: 1170, control_rod_position: [230,   0, 230, 113, 230, 230, 230, 230]}
  - {name: Bank_C,  inlet_temperature: 565, boron_concentration: 1170, control_rod_position: [230, 230,   0, 119, 230, 230, 230, 230]}
  - {name: Bank_D,  inlet_temperature: 565, boron_concentration: 1170, control_rod_position: [230, 230, 230,  18, 230, 230, 230, 230]}
  - {name: Bank_SA, inlet_temperature: 565, boron_concentration: 1170, control_rod_position: [230, 230, 230,  69,   0, 230, 230, 230]}
  - {name: Bank_SB, inlet_temperature: 565, boron_concentration: 1170, control_rod_position: [230, 230, 230, 134, 230,   0, 230, 230]}
  - {name: Bank_SC, inlet_temperature: 565, boron_concentration: 1170, control_rod_position: [230, 230, 230,  71, 230, 230,   0, 230]}
  - {name: Bank_SD, inlet_temperature: 565, boron_concentration: 1170, control_rod_position: [230, 230, 230,  71, 230, 230, 230,   0]}
  temperature_coefficients:
  - {name: ARO, types: [ITC], boron_concentration: 1291, delta_temperature: 5, control_rod_position: [230, 230, 230, 230, 230, 230, 230, 230]}
  control_rod_worths:
  - {name: ARO,     control_rod_position: [230, 230, 230, 230, 230, 230, 230, 230], boron_concentration: 1170}
  - {name: Bank_A,  control_rod_position: [  0, 230, 230, 230, 230, 230, 230, 230]}
  - {name: Bank_B,  control_rod_position: [230,   0, 230, 230, 230, 230, 230, 230]}
  - {name: Bank_C,  control_rod_position: [230, 230,   0, 230, 230, 230, 230, 230]}
  - {name: Bank_D,  control_rod_position: [230, 230, 230,   0, 230, 230, 230, 230]}
  - {name: Bank_SA, control_rod_position: [230, 230, 230, 230,   0, 230, 230, 230]}
  - {name: Bank_SB, control_rod_position: [230, 230, 230, 230, 230,   0, 230, 230]}
  - {name: Bank_SC, control_rod_position: [230, 230, 230, 230, 230, 230,   0, 230]}
  - {name: Bank_SD, control_rod_position: [230, 230, 230, 230, 230, 230, 230,   0]}
  control_rod_worths_curve:
  - name: D
    boron_concentration: 1230
    steps:
    - {step: 0  , control_rod_position: [230, 230, 230, 0  , 230, 230, 230, 230]}
    - {step: 23 , control_rod_position: [230, 230, 230, 23 , 230, 230, 230, 230]}
    - {step: 46 , control_rod_position: [230, 230, 230, 46 , 230, 230, 230, 230]}
    - {step: 69 , control_rod_position: [230, 230, 230, 69 , 230, 230, 230, 230]}
    - {step: 92 , control_rod_position: [230, 230, 230, 92 , 230, 230, 230, 230]}
    - {step: 115, control_rod_position: [230, 230, 230, 115, 230, 230, 230, 230]}
    - {step: 138, control_rod_position: [230, 230, 230, 138, 230, 230, 230, 230]}
    - {step: 161, control_rod_position: [230, 230, 230, 161, 230, 230, 230, 230]}
    - {step: 184, control_rod_position: [230, 230, 230, 184, 230, 230, 230, 230]}
    - {step: 207, control_rod_position: [230, 230, 230, 207, 230, 230, 230, 230]}
    - {step: 230, control_rod_position: [230, 230, 230, 230, 230, 230, 230, 230]}

3.30. VERA_6

materials:
- name: Fuel_31
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: Inconel
  elements: [Si-nat, Ti-nat, Cr-nat, Fe-nat, Ni-nat]
  number_densities: [4.390283e-03, 2.575975e-03, 1.42283623e-02, 6.182259e-03, 6.1343581e-02]
- name: Top_Nozzle
  elements: [H-H2O, B-nat, C-nat, O-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [4.01211E-02, 4.347852e-05, 6.14459E-05, 2.00606E-02, 3.280602e-04, 1.33861E-05, 3.3668141e-03, 3.35423E-04, 1.12810335e-02, 1.4913264e-03]
- name: Bottom_Nozzle
  elements: [H-H2O, B-nat, C-nat, O-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [3.57661E-02, 3.871934E-05, 8.96008E-05, 1.78830E-02, 4.790789e-04, 1.95482E-05, 4.916672e-03, 4.89830E-04, 1.647405189e-02, 2.1778303e-03]
- name: Core_Plates
  elements: [H-H2O, B-nat, C-nat, O-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [2.48112E-02, 2.67859e-05, 1.60447E-04, 1.24056E-02, 8.573762e-04, 3.49842E-05, 8.799055e-03, 8.76618E-04, 2.94825369e-02, 1.2442082e-03]

geometries:
  structures:
  - name: F31
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_31, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: PLG
    primitives:
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Zircaloy-4, space: '1'}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: PLE
    primitives:
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Helium, space: '1'}
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3239, 0.4581]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}
  - &ref 
    name: ref_mod
    primitives:
    - {type: CIRCLE, radius: 100}
    regions:
    - {material: MOD, space: '1'}
  - <<: *ref
    name: ref_bottom_nozzle
    regions:
    - {material: Bottom_Nozzle, space: '1'}
  - <<: *ref
    name: ref_top_nozzle
    regions:
    - {material: Top_Nozzle, space: '1'}
  - <<: *ref
    name: ref_core_plates
    regions:
    - {material: Core_Plates, space: '1'}
  - &grid 
    name: GRD0
    primitives:
    - type: POLYGON
      vertexes:
      - {x: -0.60545, y: -0.60545}
      - {x:  0.60545, y: -0.60545}
      - {x:  0.60545, y:  0.60545}
      - {x: -0.60545, y:  0.60545}
    - type: POLYGON
      vertexes:
      - {x: -0.63000, y: -0.63000}
      - {x:  0.63000, y: -0.63000}
      - {x:  0.63000, y:  0.63000}
      - {x: -0.63000, y:  0.63000}
    regions:
    - {material: Zircaloy-4, space: 2-1}
  - <<: *grid
    name: GRD1
    regions:
    - {material: Inconel, space: 2-1}

  lattices:
  - name: L31
    cell_map:
      [F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, IT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31]
  - name: lattice_plug
    cell_map:
      [PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, IT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG]
  - name: lattice_plenum
    cell_map:
      [PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, IT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE]
  - name: gap_water
    cell_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', GT, '', '', GT, '', '', GT, '', '', '', '', '',
        '', '', '', GT, '', '', '', '', '', '', '', '', '', GT, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', GT, '', '', GT, '', '', IT, '', '', GT, '', '', GT, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', GT, '', '', '', '', '', '', '', '', '', GT, '', '', '',
        '', '', '', '', '', GT, '', '', GT, '', '', GT, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']

  grids:
  - name: intermediate_grid_spacer
    grid_map:
      [GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0]
  - name: end_grid_spacer
    grid_map:
      [GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1]

  assemblies:
  - name: A31
    axial: 
    - {slice: gap_water, height: 4.228}
    - {slice: lattice_plug, height: 1.67}
    - {slice: L31, height: 365.76}
    - {slice: lattice_plenum, height: 16.0}
    - {slice: lattice_plug, height: 1.67}
    - {slice: gap_water, height: 2.129}
    grids:
    - {slice: end_grid_spacer, height: 3.866, position: 5.898}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 67.242}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 119.442}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 171.642}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 223.842}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 276.042}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 328.242}
    - {slice: end_grid_spacer, height: 3.866, position: 380.214}

  core:
    name: VERA_6
    type: SQUARE
    symmetry: 4
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 8.3
    outer_albedo: 1.0
    assembly_map: 
      [A31]
    reflector_top:
    - {slice: ref_top_nozzle, height: 8.827}
    - {slice: ref_core_plates, height: 7.6}
    - {slice: ref_mod, height: 20}
    reflector_bottom:
    - {slice: ref_mod, height: 20}
    - {slice: ref_core_plates, height: 5.0}
    - {slice: ref_bottom_nozzle, height: 6.053}
 
state:
  system_pressure: 15.516           # MPa
  total_power: 17.67                # MW
  inlet_temperature: 565.0          # K
  boron_concentration: 1300
  inlet_mass_flow_rate: 85.968       # kg/s

settings:
  power_iteration:
    fission_converge_criterion: 1.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.05
  thermal:
    model_option: DIRECT   
    solid:
      pellet_rings_number: 8
      gap_conductivity: 5678.3
      theoretical_density_persent: 0.95
      effective_fuel_temperature: [0.3, 0.7]

3.31. VERA_7

materials:
- name: Fuel_211
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57591E-02, 4.04814E-06, 4.88801E-04, 2.23756E-06, 2.23844E-02]
- name: Fuel_2619
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57617E-02, 5.09503E-06, 6.06733E-04, 2.76809E-06, 2.22663E-02]
- name: Fuel_311
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: Pyrex
  elements: [B-10b, B-11, O-nat, Si-nat]
  number_densities: [9.63266E-04, 3.90172E-03, 4.67761E-02, 1.9732607e-02]
- name: AIC
  elements: [Ag-nat, Cd-nat, In-nat]
  number_densities: [4.55562e-02, 2.7321858e-03, 8.024762e-03]
- name: B4C
  elements: [B-nat, C-nat]
  number_densities: [7.6728E-02, 1.91820E-02]
- name: SS304
  elements: [C-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [3.20895E-04, 1.7153747e-03, 6.99938E-05, 1.7604461e-02, 1.75387E-03, 5.8986522e-02, 7.797858e-03]
- name: CS508
  elements: [C-nat, Fe-nat]
  number_densities: [3.93598E-03, 8.380507e-02]
- name: Inconel
  elements: [Si-nat, Ti-nat, Cr-nat, Fe-nat, Ni-nat]
  number_densities: [4.390283e-03, 2.575975e-03, 1.42283623e-02, 6.182259e-03, 6.1343581e-02]
- name: Top_Nozzle
  elements: [H-H2O, B-nat, C-nat, O-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [4.01211E-02, 4.347852e-05, 6.14459E-05, 2.00606E-02, 3.280602e-04, 1.33861E-05, 3.3668141e-03, 3.35423E-04, 1.12810335e-02, 1.4913264e-03]
- name: Bottom_Nozzle
  elements: [H-H2O, B-nat, C-nat, O-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [3.57661E-02, 3.871934E-05, 8.96008E-05, 1.78830E-02, 4.790789e-04, 1.95482E-05, 4.916672e-03, 4.89830E-04, 1.647405189e-02, 2.1778303e-03]
- name: Core_Plates
  elements: [H-H2O, B-nat, C-nat, O-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [2.48112E-02, 2.67859e-05, 1.60447E-04, 1.24056E-02, 8.573762e-04, 3.49842E-05, 8.799055e-03, 8.76618E-04, 2.94825369e-02, 1.2442082e-03]

geometries:
  structures:
  - &fuel_pin
    name: F31
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_311, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    # meshing: {type: SECTORS, num_azimuths: 8, radii: [0.2365, 0.3344, 0.55, 0.66]}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - <<: *fuel_pin
    name: F21
    regions:
    - {material: Fuel_211, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
  - <<: *fuel_pin
    name: F26
    regions:
    - {material: Fuel_2619, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
  - name: PLG
    primitives:
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Zircaloy-4, space: '1'}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: CRD_plug
    primitives:
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: SS304, space: '1'}
  - name: PLE
    primitives:
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Helium, space: '1'}
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.32, 0.38]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}
  - name: IT_pin
    primitives:
    - {type: CIRCLE, radius: 0.258}
    - {type: CIRCLE, radius: 0.382}
    regions:
    - {material: AIR, space: '1'}
    - {material: SS304, space: 2-1}
  - name: AIC_pin
    primitives:
    - {type: CIRCLE, radius: 0.373}
    - {type: CIRCLE, radius: 0.382}
    - {type: CIRCLE, radius: 0.386}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: AIC, space: '1'}
    - {material: AIC, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: SS304, space: 4-3}
  - name: B4C_pin
    primitives:
    - {type: CIRCLE, radius: 0.373}
    - {type: CIRCLE, radius: 0.382}
    - {type: CIRCLE, radius: 0.386}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: B4C, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: SS304, space: 4-3}
  - name: CRD_plenum
    primitives:
    - {type: CIRCLE, radius: 0.373}
    - {type: CIRCLE, radius: 0.382}
    - {type: CIRCLE, radius: 0.386}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: Helium, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: SS304, space: 4-3}
  - name: Pyrex_poison
    primitives:
    - {type: CIRCLE, radius: 0.214}
    - {type: CIRCLE, radius: 0.231}
    - {type: CIRCLE, radius: 0.241}
    - {type: CIRCLE, radius: 0.427}
    - {type: CIRCLE, radius: 0.437}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: Helium, space: '1'}
    - {material: SS304, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: Pyrex, space: 4-3}
    - {material: Helium, space: 5-4}
    - {material: SS304, space: 6-5}
  - name: Pyrex_plug
    primitives:
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: SS304, space: '1'}
  - name: Pyrex_plenum
    primitives:
    - {type: CIRCLE, radius: 0.214}
    - {type: CIRCLE, radius: 0.231}
    - {type: CIRCLE, radius: 0.437}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: Helium, space: '1'}
    - {material: SS304, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: SS304, space: 4-3}
  - &grid 
    name: GRD0
    primitives:
    - type: POLYGON
      vertexes:
      - {x: -0.60545, y: -0.60545}
      - {x:  0.60545, y: -0.60545}
      - {x:  0.60545, y:  0.60545}
      - {x: -0.60545, y:  0.60545}
    - type: POLYGON
      vertexes:
      - {x: -0.63000, y: -0.63000}
      - {x:  0.63000, y: -0.63000}
      - {x:  0.63000, y:  0.63000}
      - {x: -0.63000, y:  0.63000}
    regions:
    - {material: Zircaloy-4, space: 2-1}
  - <<: *grid
    name: GRD1
    regions:
    - {material: Inconel, space: 2-1}
  - name: ref_middle
    primitives:
    - {type: CIRCLE, radius: 187.96}
    - {type: CIRCLE, radius: 193.68}
    - {type: CIRCLE, radius: 194.64}
    - {type: CIRCLE, radius: 201.63}
    - {type: CIRCLE, radius: 219.15}
    - {type: CIRCLE, radius: 219.71}
    - {type: CIRCLE, radius: 241.70}
    - type: POLYGON
      vertexes:
      - {x:    0.0,    y:    0.0   }
      - {x:  262.3859, y:  145.4429}
      - {x:  145.4429, y:  262.3859}
    - type: POLYGON
      vertexes:
      - {x:    0.0,    y:    0.0   }
      - {x: -262.3859, y:  145.4429}
      - {x: -145.4429, y:  262.3859}
    - type: POLYGON
      vertexes:
      - {x:    0.0,    y:    0.0   }
      - {x:  262.3859, y: -145.4429}
      - {x:  145.4429, y: -262.3859}
    - type: POLYGON
      vertexes:
      - {x:    0.0,    y:    0.0   }
      - {x: -262.3859, y: -145.4429}
      - {x: -145.4429, y: -262.3859}
    regions:
    - {material: SS304, space: 2-1, tag: Core_Barrel}
    - {material: SS304, space: (4-3)&(8|9|10|11), tag: Neutron_Shield_Panel}
    - {material: SS304, space: 6-5, tag: Pressure_Vessel_Liner}
    - {material: CS508, space: 7-6, tag: Pressure_Vessel}
  - &ref_top_nozzle
    name: ref_top_nozzle
    primitives:
    - {type: CIRCLE, radius: 182.00}
    - {type: CIRCLE, radius: 187.96}
    - {type: CIRCLE, radius: 193.68}
    - {type: CIRCLE, radius: 219.15}
    - {type: CIRCLE, radius: 219.71}
    - {type: CIRCLE, radius: 241.70}
    regions:
    - {material: Top_Nozzle, space: '1'}
    - {material: SS304, space: 3-2}
    - {material: SS304, space: 5-4}
    - {material: CS508, space: 6-5}
  - <<: *ref_top_nozzle
    name: ref_bottom_nozzle
    regions:
    - {material: Bottom_Nozzle, space: '1'}
    - {material: SS304, space: 3-2}
    - {material: SS304, space: 5-4}
    - {material: CS508, space: 6-5}
  - <<: *ref_top_nozzle
    name: ref_core_plates
    regions:
    - {material: Core_Plates, space: '1'}
    - {material: SS304, space: 3-2}
    - {material: SS304, space: 5-4}
    - {material: CS508, space: 6-5}
  - <<: *ref_top_nozzle
    name: ref_mod
    regions:
    - {material: MOD, space: '1'}
    - {material: SS304, space: 3-2}
    - {material: SS304, space: 5-4}
    - {material: CS508, space: 6-5}

  baffles:
  - name: Baffle
    regions:
    - {thickness: 0.19, material: MOD}
    - {thickness: 2.85, material: SS304}

  lattices:
  - name: L21
    cell_map:
      [F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,F21,F21,F21,
       F21,F21,F21, GT,F21,F21,F21,F21,F21,F21,F21,F21,F21, GT,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21, GT,F21,F21, GT,F21,F21, IT,F21,F21, GT,F21,F21, GT,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21, GT,F21,F21,F21,F21,F21,F21,F21,F21,F21, GT,F21,F21,F21,
       F21,F21,F21,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21]
  - name: L26
    cell_map:
      [F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,F26,F26,F26,
       F26,F26,F26, GT,F26,F26,F26,F26,F26,F26,F26,F26,F26, GT,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26, GT,F26,F26, GT,F26,F26, IT,F26,F26, GT,F26,F26, GT,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26, GT,F26,F26,F26,F26,F26,F26,F26,F26,F26, GT,F26,F26,F26,
       F26,F26,F26,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26]
  - name: L31
    cell_map:
      [F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, IT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31]
  - name: lattice_plug
    cell_map:
      [PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, IT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG]
  - name: lattice_plenum
    cell_map:
      [PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, IT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE]
  - name: gap_water
    cell_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', GT, '', '', GT, '', '', GT, '', '', '', '', '',
        '', '', '', GT, '', '', '', '', '', '', '', '', '', GT, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', GT, '', '', GT, '', '', IT, '', '', GT, '', '', GT, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', GT, '', '', '', '', '', '', '', '', '', GT, '', '', '',
        '', '', '', '', '', GT, '', '', GT, '', '', GT, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']

  grids:
  - name: intermediate_grid_spacer
    grid_map:
      [GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0]
  - name: end_grid_spacer
    grid_map:
      [GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1]

  assemblies:
  - &A31
    name: A31
    axial: 
    - {slice: gap_water, height: 4.228}
    - {slice: lattice_plug, height: 1.67}
    - {slice: L31, height: 365.76}
    - {slice: lattice_plenum, height: 16.0}
    - {slice: lattice_plug, height: 1.67}
    - {slice: gap_water, height: 2.129}
    grids:
    - {slice: end_grid_spacer, height: 3.866, position: 5.898}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 67.242}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 119.442}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 171.642}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 223.842}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 276.042}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 328.242}
    - {slice: end_grid_spacer, height: 3.866, position: 380.214}
  - <<: *A31
    name: A26
    axial: 
    - {slice: gap_water, height: 4.228}
    - {slice: lattice_plug, height: 1.67}
    - {slice: L26, height: 365.76}
    - {slice: lattice_plenum, height: 16.0}
    - {slice: lattice_plug, height: 1.67}
    - {slice: gap_water, height: 2.129}
  - <<: *A31
    name: A21
    axial: 
    - {slice: gap_water, height: 4.228}
    - {slice: lattice_plug, height: 1.67}
    - {slice: L21, height: 365.76}
    - {slice: lattice_plenum, height: 16.0}
    - {slice: lattice_plug, height: 1.67}
    - {slice: gap_water, height: 2.129}

  inserted_rods:
  - name: ITR
    axial:
    - {slice: IT_pin, height: 391.457}
  - name: PR
    axial:
    - {slice: Pyrex_plug, height: 2.54}
    - {slice: Pyrex_poison, height: 360.68}
    - {slice: Pyrex_plenum, height: 22.2}
  - name: CR
    axial:
    - {slice: AIC_pin, height: 101.6}
    - {slice: B4C_pin, height: 259.08}
    - {slice: CRD_plenum, height: 10.7}

  instrument_bundle:
  - name: 1IT
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '',ITR, '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']

  burnable_absorber_bundle:
  - name: 8P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', PR, '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', PR, '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
  - name: 12P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
  - name: 16P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
  - name: 20P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', PR, '', '', '', '', '', PR, '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
  - name: 24P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', PR, '', '', PR, '', '', PR, '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', PR, '', '', '', '', '', PR, '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', PR, '', '', PR, '', '', PR, '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']

  control_rod_bundle:
  - name: 24C
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', CR, '', '', CR, '', '', CR, '', '', '', '', '',
        '', '', '', CR, '', '', '', '', '', '', '', '', '', CR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', CR, '', '', CR, '', '', CR, '', '', CR, '', '', CR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', CR, '', '', CR, '', '', '', '', '', CR, '', '', CR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', CR, '', '', CR, '', '', CR, '', '', CR, '', '', CR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', CR, '', '', '', '', '', '', '', '', '', CR, '', '', '',
        '', '', '', '', '', CR, '', '', CR, '', '', CR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
 
  core:
    name: VERA_7
    type: SQUARE
    symmetry: 4
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 20.0
    assembly_map: 
      [ '',  '',  '',  '', A31, A31, A31, A31, A31, A31, A31,  '',  '',  '',  '',
        '',  '', A31, A31, A31, A21, A31, A21, A31, A21, A31, A31, A31,  '',  '',
        '', A31, A31, A26, A21, A26, A21, A26, A21, A26, A21, A26, A31, A31,  '',
        '', A31, A26, A26, A26, A21, A26, A21, A26, A21, A26, A26, A26, A31,  '',
       A31, A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31, A31,
       A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31,
       A31, A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31, A31,
       A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31,
       A31, A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31, A31,
       A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31,
       A31, A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31, A31,
        '', A31, A26, A26, A26, A21, A26, A21, A26, A21, A26, A26, A26, A31,  '',
        '', A31, A31, A26, A21, A26, A21, A26, A21, A26, A21, A26, A31, A31,  '',
        '',  '', A31, A31, A31, A21, A31, A21, A31, A21, A31, A31, A31,  '',  '',
        '',  '',  '',  '', A31, A31, A31, A31, A31, A31, A31,  '',  '',  '',  '']
    burnable_absorber_map:
      [ '',  '',  '',  '',  '',  8P,  '', 12P,  '',  8P,  '',  '',  '',  '',  '',
        '',  '',  '',  '', 16P,  '', 24P,  '', 24P,  '', 16P,  '',  '',  '',  '',
        '',  '', 12P, 24P,  '', 16P,  '', 20P,  '', 16P,  '', 24P, 12P,  '',  '',
        '',  '', 24P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 24P,  '',  '',
        '', 16P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 16P,  '',
        8P,  '', 16P,  '', 20P,  '', 24P,  '', 24P,  '', 20P,  '', 16P,  '',  8P,
        '', 24P,  '', 20P,  '', 24P,  '', 20P,  '', 24P,  '', 20P,  '', 24P,  '',
       12P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 12P,
        '', 24P,  '', 20P,  '', 24P,  '', 20P,  '', 24P,  '', 20P,  '', 24P,  '',
        8P,  '', 16P,  '', 20P,  '', 24P,  '', 24P,  '', 20P,  '', 16P,  '',  8P,
        '', 16P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 16P,  '',
        '',  '', 24P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 24P,  '',  '',
        '',  '', 12P, 24P,  '', 16P,  '', 20P,  '', 16P,  '', 24P, 12P,  '',  '',
        '',  '',  '',  '', 16P,  '', 24P,  '', 24P,  '', 16P,  '',  '',  '',  '',
        '',  '',  '',  '',  '',  8P,  '', 12P,  '',  8P,  '',  '',  '',  '',  '']
    burnable_absorber_position:
      [     0,     0,     0,     0,     0, 7.224,     0, 7.224,     0, 7.224,     0,     0,     0,     0,     0,
            0,     0,     0,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0,     0,     0,     0,
            0,     0, 7.224, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224, 7.224,     0,     0,
            0,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0,     0,
            0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0,
        7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,
            0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0,
        7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,
            0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0,
        7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,
            0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0,
            0,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0,     0,
            0,     0, 7.224, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224, 7.224,     0,     0,
            0,     0,     0,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0,     0,     0,     0,
            0,     0,     0,     0,     0, 7.224,     0, 7.224,     0, 7.224,     0,     0,     0,     0,     0]
    baffle:
    - {slice: Baffle, height: 391.457}
    reflector_middle:
    - {slice: ref_middle, height: 391.457}
    reflector_top:
    - {slice: ref_top_nozzle, height: 8.827}
    - {slice: ref_core_plates, height: 7.6}
    - {slice: ref_mod, height: 20}
    reflector_bottom:
    - {slice: ref_mod, height: 20}
    - {slice: ref_core_plates, height: 5.0}
    - {slice: ref_bottom_nozzle, height: 6.053}
    control_rod:
      max_num_steps: 230
      step_size: 1.5875
      fully_withdrawn_height: 371.658
      banks:
      - {name:  A, bundle: 24C, position: 230}
      - {name:  B, bundle: 24C, position: 230}
      - {name:  C, bundle: 24C, position: 230}
      - {name:  D, bundle: 24C, position: 215}
      - {name: SA, bundle: 24C, position: 230}
      - {name: SB, bundle: 24C, position: 230}
      - {name: SC, bundle: 24C, position: 230}
      - {name: SD, bundle: 24C, position: 230}
      location_map:
        [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
          '', '', '', SA, '',  B, '',  C, '',  B, '', SA, '', '', '',
          '', '', '', '', SD, '', SB, '', SB, '', SD, '', '', '', '',
          '', SA, '',  D, '', '', '',  D, '', '', '',  D, '', SA, '',
          '', '', SC, '',  A, '', '', '', '', '',  A, '', SC, '', '',
          '',  B, '', '', '',  C, '',  A, '',  C, '', '', '',  B, '',
          '', '', SB, '', '', '', '', '', '', '', '', '', SB, '', '',
          '',  C, '',  D, '',  A, '',  D, '',  A, '',  D, '',  C, '',
          '', '', SB, '', '', '', '', '', '', '', '', '', SB, '', '',
          '',  B, '', '', '',  C, '',  A, '',  C, '', '', '',  B, '',
          '', '', SC, '',  A, '', '', '', '', '',  A, '', SC, '', '',
          '', SA, '',  D, '', '', '',  D, '', '', '',  D, '', SA, '',
          '', '', '', '', SD, '', SB, '', SB, '', SD, '', '', '', '',
          '', '', '', SA, '',  B, '',  C, '',  B, '', SA, '', '', '',
          '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
    detector:
      reaction_id: 1003
      axial:
      - {height: 10.0, position:   5.898}
      - {height: 10.0, position:  15.898}
      - {height: 10.0, position:  25.898}
      - {height: 10.0, position:  35.898}
      - {height: 10.0, position:  45.898}
      - {height: 10.0, position:  55.898}
      - {height: 10.0, position:  65.898}
      - {height: 10.0, position:  75.898}
      - {height: 10.0, position:  85.898}
      - {height: 10.0, position:  95.898}
      - {height: 10.0, position: 105.898}
      - {height: 10.0, position: 115.898}
      - {height: 10.0, position: 125.898}
      - {height: 10.0, position: 135.898}
      - {height: 10.0, position: 145.898}
      - {height: 10.0, position: 155.898}
      - {height: 10.0, position: 165.898}
      - {height: 10.0, position: 175.898}
      - {height: 10.0, position: 185.898}
      - {height: 10.0, position: 195.898}
      - {height: 10.0, position: 205.898}
      - {height: 10.0, position: 215.898}
      - {height: 10.0, position: 225.898}
      - {height: 10.0, position: 235.898}
      - {height: 10.0, position: 245.898}
      - {height: 10.0, position: 255.898}
      - {height: 10.0, position: 265.898}
      - {height: 10.0, position: 275.898}
      - {height: 10.0, position: 285.898}
      - {height: 10.0, position: 295.898}
      - {height: 10.0, position: 305.898}
      - {height: 10.0, position: 315.898}
      - {height: 10.0, position: 325.898}
      - {height: 10.0, position: 335.898}
      - {height: 10.0, position: 345.898}
      - {height: 10.0, position: 355.898}
      radial:
        [ '',  '',  '',  '',  '',  '', 1IT,  '',  '', 1IT,  '',  '',  '',  '',  '',
          '',  '', 1IT,  '',  '', 1IT,  '', 1IT,  '',  '',  '',  '',  '',  '',  '',
          '',  '',  '',  '',  '',  '',  '', 1IT,  '', 1IT,  '', 1IT,  '', 1IT,  '',
          '', 1IT, 1IT,  '',  '',  '',  '', 1IT,  '',  '',  '',  '',  '',  '',  '',
          '',  '',  '',  '', 1IT,  '',  '',  '', 1IT,  '', 1IT,  '', 1IT,  '',  '',
         1IT,  '', 1IT,  '',  '', 1IT,  '', 1IT,  '',  '',  '',  '',  '', 1IT,  '',
          '',  '',  '', 1IT,  '',  '', 1IT,  '',  '', 1IT,  '',  '', 1IT,  '',  '',
         1IT,  '', 1IT,  '', 1IT,  '', 1IT,  '',  '', 1IT,  '', 1IT, 1IT, 1IT,  '',
          '', 1IT,  '',  '',  '',  '',  '',  '', 1IT,  '', 1IT,  '',  '',  '', 1IT,
          '',  '',  '',  '', 1IT,  '', 1IT,  '',  '',  '',  '', 1IT,  '',  '',  '',
         1IT,  '',  '',  '', 1IT,  '',  '', 1IT,  '',  '', 1IT,  '',  '',  '', 1IT,
          '',  '',  '',  '',  '', 1IT,  '',  '', 1IT,  '',  '', 1IT,  '',  '',  '',
          '',  '', 1IT,  '', 1IT,  '',  '', 1IT,  '',  '',  '',  '',  '', 1IT,  '',
          '',  '', 1IT,  '',  '',  '', 1IT,  '',  '', 1IT,  '', 1IT,  '',  '',  '',
          '',  '',  '',  '', 1IT,  '',  '', 1IT,  '',  '',  '',  '',  '',  '',  '']

state:
  system_pressure: 15.516
  total_power: 3411
  moderator_temperature: 565
  fuel_temperature: 565
  inlet_temperature: 565.0
  boron_concentration: 1285
  inlet_mass_flow_rate: 16593.92     # kg/s

settings:
  xe_transients: EQUI
  critical_boron_search: 
    boron_converge_criterion: 0.1
  power_iteration:
    fission_converge_criterion: 5.0e-4
    keff_converge_criterion: 1.0e-5
  moc_2d:
    num_azimuths: 12
    num_polars: 3
    track_density: 0.05

  thermal:
    model_option: DIRECT   
    solid:
      pellet_rings_number: 8
      gap_conductivity: 5678.3
      theoretical_density_persent: 0.95
      effective_fuel_temperature: [0.3, 0.7]

3.32. VERA_9

materials:
- name: Fuel_211
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57591E-02, 4.04814E-06, 4.88801E-04, 2.23756E-06, 2.23844E-02]
- name: Fuel_2619
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57617E-02, 5.09503E-06, 6.06733E-04, 2.76809E-06, 2.22663E-02]
- name: Fuel_311
  elements: [O-nat, U-234, U-235, U-236, U-238]
  number_densities: [4.57642e-02, 6.11864e-06, 7.18132e-04, 3.29861E-06, 2.21546e-02]
- name: Helium
  elements: [He-4]
  number_densities: [2.68714e-05]
- name: Zircaloy-4
  elements: [Hf-nat, Cr-nat, Fe-nat, Zr-nat, Sn-nat]
  number_densities: [2.21336e-06, 7.59772e-05, 1.485589e-04, 4.253938e-02, 4.8254218e-04]
- name: Pyrex
  elements: [B-10b, B-11, O-nat, Si-nat]
  number_densities: [9.63266E-04, 3.90172E-03, 4.67761E-02, 1.9732607e-02]
- name: AIC
  elements: [Ag-nat, Cd-nat, In-nat]
  number_densities: [4.55562e-02, 2.7321858e-03, 8.024762e-03]
- name: B4C
  elements: [B-nat, C-nat]
  number_densities: [7.6728E-02, 1.91820E-02]
- name: SS304
  elements: [C-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [3.20895E-04, 1.7153747e-03, 6.99938E-05, 1.7604461e-02, 1.75387E-03, 5.8986522e-02, 7.797858e-03]
- name: CS508
  elements: [C-nat, Fe-nat]
  number_densities: [3.93598E-03, 8.380507e-02]
- name: Inconel
  elements: [Si-nat, Ti-nat, Cr-nat, Fe-nat, Ni-nat]
  number_densities: [4.390283e-03, 2.575975e-03, 1.42283623e-02, 6.182259e-03, 6.1343581e-02]
- name: Top_Nozzle
  elements: [H-H2O, B-nat, C-nat, O-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [4.01217E-02, 4.300326e-05, 6.14459E-05, 2.00608E-02, 3.280602e-04, 1.33861E-05, 3.3668141e-03, 3.35423E-04, 1.12810335e-02, 1.4913264e-03]
- name: Bottom_Nozzle
  elements: [H-H2O, B-nat, C-nat, O-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [3.57666E-02, 3.825655e-05, 8.96008E-05, 1.78833E-02, 4.790789e-04, 1.95482E-05, 4.916672e-03, 4.89830E-04, 1.647405189e-02, 2.1778303e-03]
- name: Core_Plates
  elements: [H-H2O, B-nat, C-nat, O-nat, Si-nat, P-nat, Cr-nat, Mn-nat, Fe-nat, Ni-nat]
  number_densities: [2.48115E-02, 2.654245e-05, 1.60447E-04, 1.24058E-02, 8.573762e-04, 3.49842E-05, 8.799055e-03, 8.76618E-04, 2.94825369e-02, 1.2442082e-03]

geometries:
  structures:
  - &fuel_pin
    name: F31
    primitives:
    - {type: CIRCLE, radius: 0.4096}
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Fuel_311, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
    # meshing: {type: SECTORS, num_azimuths: 8, radii: [0.2365, 0.3344, 0.55, 0.66]}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - <<: *fuel_pin
    name: F21
    regions:
    - {material: Fuel_211, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
  - <<: *fuel_pin
    name: F26
    regions:
    - {material: Fuel_2619, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Zircaloy-4, space: 3-2}
  - name: PLG
    primitives:
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Zircaloy-4, space: '1'}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: CRD_plug
    primitives:
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: SS304, space: '1'}
  - name: PLE
    primitives:
    - {type: CIRCLE, radius: 0.4180}
    - {type: CIRCLE, radius: 0.4750}
    regions:
    - {material: Helium, space: '1'}
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 4, radii: [0.2365, 0.3344, -0.4750, 0.5800]}
  - name: GT
    primitives:
    - {type: CIRCLE, radius: 0.561}
    - {type: CIRCLE, radius: 0.602}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.32, 0.38]}
  - name: IT
    primitives:
    - {type: CIRCLE, radius: 0.559}
    - {type: CIRCLE, radius: 0.605}
    regions:
    - {material: Zircaloy-4, space: 2-1}
    meshing: {type: SECTORS, num_azimuths: 8, radii: [0.3227, 0.4564]}
  - name: IT_pin
    primitives:
    - {type: CIRCLE, radius: 0.258}
    - {type: CIRCLE, radius: 0.382}
    regions:
    - {material: AIR, space: '1'}
    - {material: SS304, space: 2-1}
  - name: AIC_pin
    primitives:
    - {type: CIRCLE, radius: 0.373}
    - {type: CIRCLE, radius: 0.382}
    - {type: CIRCLE, radius: 0.386}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: AIC, space: '1'}
    - {material: AIC, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: SS304, space: 4-3}
  - name: B4C_pin
    primitives:
    - {type: CIRCLE, radius: 0.373}
    - {type: CIRCLE, radius: 0.382}
    - {type: CIRCLE, radius: 0.386}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: B4C, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: SS304, space: 4-3}
  - name: CRD_plenum
    primitives:
    - {type: CIRCLE, radius: 0.373}
    - {type: CIRCLE, radius: 0.382}
    - {type: CIRCLE, radius: 0.386}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: Helium, space: '1'}
    - {material: Helium, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: SS304, space: 4-3}
  - name: Pyrex_poison
    primitives:
    - {type: CIRCLE, radius: 0.214}
    - {type: CIRCLE, radius: 0.231}
    - {type: CIRCLE, radius: 0.241}
    - {type: CIRCLE, radius: 0.427}
    - {type: CIRCLE, radius: 0.437}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: Helium, space: '1'}
    - {material: SS304, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: Pyrex, space: 4-3}
    - {material: Helium, space: 5-4}
    - {material: SS304, space: 6-5}
  - name: Pyrex_plug
    primitives:
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: SS304, space: '1'}
  - name: Pyrex_plenum
    primitives:
    - {type: CIRCLE, radius: 0.214}
    - {type: CIRCLE, radius: 0.231}
    - {type: CIRCLE, radius: 0.437}
    - {type: CIRCLE, radius: 0.484}
    regions:
    - {material: Helium, space: '1'}
    - {material: SS304, space: 2-1}
    - {material: Helium, space: 3-2}
    - {material: SS304, space: 4-3}
  - &grid 
    name: GRD0
    primitives:
    - type: POLYGON
      vertexes:
      - {x: -0.60545, y: -0.60545}
      - {x:  0.60545, y: -0.60545}
      - {x:  0.60545, y:  0.60545}
      - {x: -0.60545, y:  0.60545}
    - type: POLYGON
      vertexes:
      - {x: -0.63000, y: -0.63000}
      - {x:  0.63000, y: -0.63000}
      - {x:  0.63000, y:  0.63000}
      - {x: -0.63000, y:  0.63000}
    regions:
    - {material: Zircaloy-4, space: 2-1}
  - <<: *grid
    name: GRD1
    regions:
    - {material: Inconel, space: 2-1}
  - name: ref_middle
    primitives:
    - {type: CIRCLE, radius: 187.96}
    - {type: CIRCLE, radius: 193.68}
    - {type: CIRCLE, radius: 194.64}
    - {type: CIRCLE, radius: 201.63}
    - {type: CIRCLE, radius: 219.15}
    - {type: CIRCLE, radius: 219.71}
    - {type: CIRCLE, radius: 241.70}
    - type: POLYGON
      vertexes:
      - {x:    0.0,    y:    0.0   }
      - {x:  262.3859, y:  145.4429}
      - {x:  145.4429, y:  262.3859}
    - type: POLYGON
      vertexes:
      - {x:    0.0,    y:    0.0   }
      - {x: -262.3859, y:  145.4429}
      - {x: -145.4429, y:  262.3859}
    - type: POLYGON
      vertexes:
      - {x:    0.0,    y:    0.0   }
      - {x:  262.3859, y: -145.4429}
      - {x:  145.4429, y: -262.3859}
    - type: POLYGON
      vertexes:
      - {x:    0.0,    y:    0.0   }
      - {x: -262.3859, y: -145.4429}
      - {x: -145.4429, y: -262.3859}
    regions:
    - {material: SS304, space: 2-1, tag: Core_Barrel}
    - {material: SS304, space: (4-3)&(8|9|10|11), tag: Neutron_Shield_Panel}
    - {material: SS304, space: 6-5, tag: Pressure_Vessel_Liner}
    - {material: CS508, space: 7-6, tag: Pressure_Vessel}
  - &ref_top_nozzle
    name: ref_top_nozzle
    primitives:
    - {type: CIRCLE, radius: 182.00}
    - {type: CIRCLE, radius: 187.96}
    - {type: CIRCLE, radius: 193.68}
    - {type: CIRCLE, radius: 219.15}
    - {type: CIRCLE, radius: 219.71}
    - {type: CIRCLE, radius: 241.70}
    regions:
    - {material: Top_Nozzle, space: '1'}
    - {material: SS304, space: 3-2}
    - {material: SS304, space: 5-4}
    - {material: CS508, space: 6-5}
  - <<: *ref_top_nozzle
    name: ref_bottom_nozzle
    regions:
    - {material: Bottom_Nozzle, space: '1'}
    - {material: SS304, space: 3-2}
    - {material: SS304, space: 5-4}
    - {material: CS508, space: 6-5}
  - <<: *ref_top_nozzle
    name: ref_core_plates
    regions:
    - {material: Core_Plates, space: '1'}
    - {material: SS304, space: 3-2}
    - {material: SS304, space: 5-4}
    - {material: CS508, space: 6-5}
  - <<: *ref_top_nozzle
    name: ref_mod
    regions:
    - {material: MOD, space: '1'}
    - {material: SS304, space: 3-2}
    - {material: SS304, space: 5-4}
    - {material: CS508, space: 6-5}

  baffles:
  - name: Baffle
    regions:
    - {thickness: 0.19, material: MOD}
    - {thickness: 2.85, material: SS304}

  lattices:
  - name: L21
    cell_map:
      [F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,F21,F21,F21,
       F21,F21,F21, GT,F21,F21,F21,F21,F21,F21,F21,F21,F21, GT,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21, GT,F21,F21, GT,F21,F21, IT,F21,F21, GT,F21,F21, GT,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21, GT,F21,F21,F21,F21,F21,F21,F21,F21,F21, GT,F21,F21,F21,
       F21,F21,F21,F21,F21, GT,F21,F21, GT,F21,F21, GT,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,
       F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21,F21]
  - name: L26
    cell_map:
      [F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,F26,F26,F26,
       F26,F26,F26, GT,F26,F26,F26,F26,F26,F26,F26,F26,F26, GT,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26, GT,F26,F26, GT,F26,F26, IT,F26,F26, GT,F26,F26, GT,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26, GT,F26,F26,F26,F26,F26,F26,F26,F26,F26, GT,F26,F26,F26,
       F26,F26,F26,F26,F26, GT,F26,F26, GT,F26,F26, GT,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,
       F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26,F26]
  - name: L31
    cell_map:
      [F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, IT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31, GT,F31,F31,F31,F31,F31,F31,F31,F31,F31, GT,F31,F31,F31,
       F31,F31,F31,F31,F31, GT,F31,F31, GT,F31,F31, GT,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,
       F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31,F31]
  - name: lattice_plug
    cell_map:
      [PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, IT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG, GT,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,
       PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG,PLG]
  - name: lattice_plenum
    cell_map:
      [PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, IT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE, GT,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,
       PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE,PLE]
  - name: gap_water
    cell_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', GT, '', '', GT, '', '', GT, '', '', '', '', '',
        '', '', '', GT, '', '', '', '', '', '', '', '', '', GT, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', GT, '', '', GT, '', '', IT, '', '', GT, '', '', GT, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '', GT, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', GT, '', '', '', '', '', '', '', '', '', GT, '', '', '',
        '', '', '', '', '', GT, '', '', GT, '', '', GT, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']

  grids:
  - name: intermediate_grid_spacer
    grid_map:
      [GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,
       GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0,GRD0]
  - name: end_grid_spacer
    grid_map:
      [GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,
       GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1,GRD1]

  assemblies:
  - &A31
    name: A31
    axial: 
    - {slice: gap_water, height: 4.228}
    - {slice: lattice_plug, height: 1.67}
    - {slice: L31, height: 365.76}
    - {slice: lattice_plenum, height: 16.0}
    - {slice: lattice_plug, height: 1.67}
    - {slice: gap_water, height: 2.129}
    grids:
    - {slice: end_grid_spacer, height: 3.866, position: 5.898}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 67.242}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 119.442}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 171.642}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 223.842}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 276.042}
    - {slice: intermediate_grid_spacer, height: 3.810, position: 328.242}
    - {slice: end_grid_spacer, height: 3.866, position: 380.214}
  - <<: *A31
    name: A26
    axial: 
    - {slice: gap_water, height: 4.228}
    - {slice: lattice_plug, height: 1.67}
    - {slice: L26, height: 365.76}
    - {slice: lattice_plenum, height: 16.0}
    - {slice: lattice_plug, height: 1.67}
    - {slice: gap_water, height: 2.129}
  - <<: *A31
    name: A21
    axial: 
    - {slice: gap_water, height: 4.228}
    - {slice: lattice_plug, height: 1.67}
    - {slice: L21, height: 365.76}
    - {slice: lattice_plenum, height: 16.0}
    - {slice: lattice_plug, height: 1.67}
    - {slice: gap_water, height: 2.129}

  inserted_rods:
  - name: ITR
    axial:
    - {slice: IT_pin, height: 391.457}
  - name: PR
    axial:
    - {slice: Pyrex_plug, height: 2.54}
    - {slice: Pyrex_poison, height: 360.68}
    - {slice: Pyrex_plenum, height: 22.2}
  - name: CR
    axial:
    - {slice: AIC_pin, height: 101.6}
    - {slice: B4C_pin, height: 259.08}
    - {slice: CRD_plenum, height: 10.7}

  instrument_bundle:
  - name: 1IT
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '',ITR, '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']

  burnable_absorber_bundle:
  - name: 8P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', PR, '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', PR, '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
  - name: 12P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
  - name: 16P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', PR, '', '', '', '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
  - name: 20P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', PR, '', '', '', '', '', PR, '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', '', '', '', PR, '', '', '', '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
  - name: 24P
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', PR, '', '', PR, '', '', PR, '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', PR, '', '', '', '', '', PR, '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', PR, '', '', PR, '', '', PR, '', '', PR, '', '', PR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', PR, '', '', '', '', '', '', '', '', '', PR, '', '', '',
        '', '', '', '', '', PR, '', '', PR, '', '', PR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']

  control_rod_bundle:
  - name: 24C
    inserting_map:
      [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', CR, '', '', CR, '', '', CR, '', '', '', '', '',
        '', '', '', CR, '', '', '', '', '', '', '', '', '', CR, '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', CR, '', '', CR, '', '', CR, '', '', CR, '', '', CR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', CR, '', '', CR, '', '', '', '', '', CR, '', '', CR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', CR, '', '', CR, '', '', CR, '', '', CR, '', '', CR, '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', CR, '', '', '', '', '', '', '', '', '', CR, '', '', '',
        '', '', '', '', '', CR, '', '', CR, '', '', CR, '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
        '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
 
  core:
    name: VERA_9
    type: SQUARE
    symmetry: 8
    assembly_pitch: 21.5
    cell_pitch: 1.26
    plane_max_thickness: 20.0
    assembly_map: 
      [ '',  '',  '',  '', A31, A31, A31, A31, A31, A31, A31,  '',  '',  '',  '',
        '',  '', A31, A31, A31, A21, A31, A21, A31, A21, A31, A31, A31,  '',  '',
        '', A31, A31, A26, A21, A26, A21, A26, A21, A26, A21, A26, A31, A31,  '',
        '', A31, A26, A26, A26, A21, A26, A21, A26, A21, A26, A26, A26, A31,  '',
       A31, A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31, A31,
       A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31,
       A31, A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31, A31,
       A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31,
       A31, A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31, A31,
       A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31,
       A31, A31, A21, A26, A21, A26, A21, A26, A21, A26, A21, A26, A21, A31, A31,
        '', A31, A26, A26, A26, A21, A26, A21, A26, A21, A26, A26, A26, A31,  '',
        '', A31, A31, A26, A21, A26, A21, A26, A21, A26, A21, A26, A31, A31,  '',
        '',  '', A31, A31, A31, A21, A31, A21, A31, A21, A31, A31, A31,  '',  '',
        '',  '',  '',  '', A31, A31, A31, A31, A31, A31, A31,  '',  '',  '',  '']
    burnable_absorber_map:
      [ '',  '',  '',  '',  '',  8P,  '', 12P,  '',  8P,  '',  '',  '',  '',  '',
        '',  '',  '',  '', 16P,  '', 24P,  '', 24P,  '', 16P,  '',  '',  '',  '',
        '',  '', 12P, 24P,  '', 16P,  '', 20P,  '', 16P,  '', 24P, 12P,  '',  '',
        '',  '', 24P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 24P,  '',  '',
        '', 16P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 16P,  '',
        8P,  '', 16P,  '', 20P,  '', 24P,  '', 24P,  '', 20P,  '', 16P,  '',  8P,
        '', 24P,  '', 20P,  '', 24P,  '', 20P,  '', 24P,  '', 20P,  '', 24P,  '',
       12P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 12P,
        '', 24P,  '', 20P,  '', 24P,  '', 20P,  '', 24P,  '', 20P,  '', 24P,  '',
        8P,  '', 16P,  '', 20P,  '', 24P,  '', 24P,  '', 20P,  '', 16P,  '',  8P,
        '', 16P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 16P,  '',
        '',  '', 24P,  '', 20P,  '', 20P,  '', 20P,  '', 20P,  '', 24P,  '',  '',
        '',  '', 12P, 24P,  '', 16P,  '', 20P,  '', 16P,  '', 24P, 12P,  '',  '',
        '',  '',  '',  '', 16P,  '', 24P,  '', 24P,  '', 16P,  '',  '',  '',  '',
        '',  '',  '',  '',  '',  8P,  '', 12P,  '',  8P,  '',  '',  '',  '',  '']
    burnable_absorber_position:
      [     0,     0,     0,     0,     0, 7.224,     0, 7.224,     0, 7.224,     0,     0,     0,     0,     0,
            0,     0,     0,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0,     0,     0,     0,
            0,     0, 7.224, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224, 7.224,     0,     0,
            0,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0,     0,
            0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0,
        7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,
            0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0,
        7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,
            0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0,
        7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,
            0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0,
            0,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0,     0,
            0,     0, 7.224, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224, 7.224,     0,     0,
            0,     0,     0,     0, 7.224,     0, 7.224,     0, 7.224,     0, 7.224,     0,     0,     0,     0,
            0,     0,     0,     0,     0, 7.224,     0, 7.224,     0, 7.224,     0,     0,     0,     0,     0]
    baffle:
    - {slice: Baffle, height: 391.457}
    reflector_middle:
    - {slice: ref_middle, height: 391.457}
    reflector_top:
    - {slice: ref_top_nozzle, height: 8.827}
    - {slice: ref_core_plates, height: 7.6}
    - {slice: ref_mod, height: 20}
    reflector_bottom:
    - {slice: ref_mod, height: 20}
    - {slice: ref_core_plates, height: 5.0}
    - {slice: ref_bottom_nozzle, height: 6.053}
    control_rod:
      max_num_steps: 230
      step_size: 1.5875
      fully_withdrawn_height: 371.658
      banks:
      - {name:  A, bundle: 24C, position: 230}
      - {name:  B, bundle: 24C, position: 230}
      - {name:  C, bundle: 24C, position: 230}
      - {name:  D, bundle: 24C, position: 186}
      - {name: SA, bundle: 24C, position: 230}
      - {name: SB, bundle: 24C, position: 230}
      - {name: SC, bundle: 24C, position: 230}
      - {name: SD, bundle: 24C, position: 230}
      location_map:
        [ '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
          '', '', '', SA, '',  B, '',  C, '',  B, '', SA, '', '', '',
          '', '', '', '', SD, '', SB, '', SB, '', SD, '', '', '', '',
          '', SA, '',  D, '', '', '',  D, '', '', '',  D, '', SA, '',
          '', '', SC, '',  A, '', '', '', '', '',  A, '', SC, '', '',
          '',  B, '', '', '',  C, '',  A, '',  C, '', '', '',  B, '',
          '', '', SB, '', '', '', '', '', '', '', '', '', SB, '', '',
          '',  C, '',  D, '',  A, '',  D, '',  A, '',  D, '',  C, '',
          '', '', SB, '', '', '', '', '', '', '', '', '', SB, '', '',
          '',  B, '', '', '',  C, '',  A, '',  C, '', '', '',  B, '',
          '', '', SC, '',  A, '', '', '', '', '',  A, '', SC, '', '',
          '', SA, '',  D, '', '', '',  D, '', '', '',  D, '', SA, '',
          '', '', '', '', SD, '', SB, '', SB, '', SD, '', '', '', '',
          '', '', '', SA, '',  B, '',  C, '',  B, '', SA, '', '', '',
          '', '', '', '', '', '', '', '', '', '', '', '', '', '', '']
 
state:
  system_pressure: 15.516
  total_power: 3411
  relative_power: 0.01
  boron_10_abundance: 19.78
  inlet_temperature: 565.5
  boron_concentration: 1285
  inlet_mass_flow_rate: 16593.92     # kg/s

settings:
  critical_boron_search: 
    boron_converge_criterion: 0.5
  power_iteration:
    fission_converge_criterion: 5.0e-4
    keff_converge_criterion: 1.0e-5
    cmfd_on: true
  moc_2d:
    num_azimuths: 12
    num_polars: 2
    track_density: 0.05
  moc_1d:
    num_polars: 4
    max_fine_mesh_thickness: 0.5
  cmfd:
    fission_converge_criterion: 1.0e-6
    keff_converge_criterion: 1.0e-7

  thermal:
    model_option: DIRECT    #DIRECT OPENGAP, CLOSEGAP
    convergence:
      courant_number: 2.8
      min_time_step: 1.0e-6    #??
      max_time_step: 1.0e-1    #??
    solid:
      pellet_rings_number: 8
      gap_conductivity: 5678.3
      effective_fuel_temperature: [0.3, 0.7]
      theoretical_density_percentage: 0.95

depletion:
  time_step_units: MWd/tU
  states:  
  - {burnup: 346  , relative_power: 0.6570, inlet_temperature: 565.15, control_rod_position: [230, 230, 230, 192, 230, 230, 230, 230]}
  - {burnup: 1229 , relative_power: 0.9970, inlet_temperature: 565.43, control_rod_position: [230, 230, 230, 219, 230, 230, 230, 230]}
  - {burnup: 1920 , relative_power: 0.9800, inlet_temperature: 565.48, control_rod_position: [230, 230, 230, 218, 230, 230, 230, 230]}
  - {burnup: 2458 , relative_power: 1.0000, inlet_temperature: 565.71, control_rod_position: [230, 230, 230, 219, 230, 230, 230, 230]}
  - {burnup: 2996 , relative_power: 0.9970, inlet_temperature: 565.76, control_rod_position: [230, 230, 230, 215, 230, 230, 230, 230]}
  - {burnup: 3561 , relative_power: 0.9970, inlet_temperature: 565.71, control_rod_position: [230, 230, 230, 217, 230, 230, 230, 230]}
  - {burnup: 4064 , relative_power: 0.9980, inlet_temperature: 565.82, control_rod_position: [230, 230, 230, 220, 230, 230, 230, 230]}
  - {burnup: 4644 , relative_power: 0.9980, inlet_temperature: 565.59, control_rod_position: [230, 230, 230, 220, 230, 230, 230, 230]}
  - {burnup: 5139 , relative_power: 0.9950, inlet_temperature: 565.32, control_rod_position: [230, 230, 230, 219, 230, 230, 230, 230]}
  - {burnup: 5700 , relative_power: 0.9800, inlet_temperature: 565.37, control_rod_position: [230, 230, 230, 214, 230, 230, 230, 230]}
  - {burnup: 6272 , relative_power: 0.9510, inlet_temperature: 565.32, control_rod_position: [230, 230, 230, 216, 230, 230, 230, 230]}
  - {burnup: 6998 , relative_power: 0.9480, inlet_temperature: 565.32, control_rod_position: [230, 230, 230, 214, 230, 230, 230, 230]}
  - {burnup: 7463 , relative_power: 0.9980, inlet_temperature: 565.26, control_rod_position: [230, 230, 230, 220, 230, 230, 230, 230]}
  - {burnup: 7978 , relative_power: 0.9390, inlet_temperature: 565.09, control_rod_position: [230, 230, 230, 218, 230, 230, 230, 230]}
  - {burnup: 8492 , relative_power: 1.0010, inlet_temperature: 565.37, control_rod_position: [230, 230, 230, 222, 230, 230, 230, 230]}
  - {burnup: 9141 , relative_power: 0.9970, inlet_temperature: 565.21, control_rod_position: [230, 230, 230, 220, 230, 230, 230, 230]}
  - {burnup: 9602 , relative_power: 1.0020, inlet_temperature: 565.15, control_rod_position: [230, 230, 230, 222, 230, 230, 230, 230]}
  - {burnup: 10344, relative_power: 0.9560, inlet_temperature: 565.32, control_rod_position: [230, 230, 230, 211, 230, 230, 230, 230]}
  - {burnup: 10843, relative_power: 0.9640, inlet_temperature: 565.43, control_rod_position: [230, 230, 230, 215, 230, 230, 230, 230]}
  - {burnup: 11315, relative_power: 0.9340, inlet_temperature: 565.04, control_rod_position: [230, 230, 230, 211, 230, 230, 230, 230]}
  - {burnup: 11987, relative_power: 0.9970, inlet_temperature: 565.09, control_rod_position: [230, 230, 230, 217, 230, 230, 230, 230]}
  - {burnup: 12552, relative_power: 0.9800, inlet_temperature: 565.15, control_rod_position: [230, 230, 230, 215, 230, 230, 230, 230]}
  - {burnup: 13359, relative_power: 0.9940, inlet_temperature: 565.21, control_rod_position: [230, 230, 230, 220, 230, 230, 230, 230]}
  - {burnup: 14334, relative_power: 0.9990, inlet_temperature: 565.26, control_rod_position: [230, 230, 230, 219, 230, 230, 230, 230]}
  - {burnup: 15068, relative_power: 0.8690, inlet_temperature: 564.65, control_rod_position: [230, 230, 230, 202, 230, 230, 230, 230]}
  - {burnup: 15310, relative_power: 0.9960, inlet_temperature: 565.37, control_rod_position: [230, 230, 230, 220, 230, 230, 230, 230]}
  - {burnup: 15775, relative_power: 0.8990, inlet_temperature: 564.87, control_rod_position: [230, 230, 230, 224, 230, 230, 230, 230]}
  - {burnup: 16270, relative_power: 0.7880, inlet_temperature: 564.43, control_rod_position: [230, 230, 230, 228, 230, 230, 230, 230]}
  - {burnup: 16939, relative_power: 0.6450, inlet_temperature: 563.65, control_rod_position: [230, 230, 230, 230, 230, 230, 230, 230]}