# Simple description of the C5G7 benchmark problem # General description from: https://www.oecd-nea.org/upload/docs/application/pdf/2019-12/nsc-doc2003-16.pdf # Composition/dimensions description from: https://www.oecd-nea.org/upload/docs/application/pdf/2020-01/nsc-doc96-02-rev2.pdf # start-custom-isotopics custom isotopics: # NEA/NSC/DOC(96)2 Table 2 - Isotopic Distributions for each medium mox low: # 4.3% input format: number densities U235: 5.00E-5 U238: 2.21E-2 PU238: 1.50E-5 PU239: 5.80E-4 PU240: 2.40E-4 PU241: 9.80E-5 PU242: 5.40E-5 AM241: 1.30E-5 O: 4.63E-2 mox medium: # 7.0% input format: number densities U235: 5.00E-5 U238: 2.21E-2 PU238: 2.40E-5 PU239: 9.30E-4 PU240: 3.90E-4 PU241: 1.52E-4 PU242: 8.40E-5 AM241: 2.00E-5 O: 4.63E-2 mox high: # 8.7% input format: number densities U235: 5.00E-5 U238: 2.21E-2 PU238: 3.00E-5 PU239: 1.16E-3 PU240: 4.90E-4 PU241: 1.90E-4 PU242: 1.05E-4 AM241: 2.50E-5 O: 4.63E-2 UO2: input format: number densities U235: 8.65e-4 U238: 2.225E-2 O: 4.622E-2 moderator: input format: number densities H: 6.70e-2 O: 3.35E-2 B: 2.78E-5 Zr clad: input format: number densities ZR: 4.30E-2 Al clad: input format: number densities AL27: 6.00e-2 fission chamber: # NEA/NSC/DOC(96)2 Documents: # "Central guide tube contains: moderator (as defined in Table 2) # and 1.0E-8 at/(b cm) of U-235" input format: number densities H: 6.70e-2 O: 3.35E-2 B: 2.78E-5 U235: 1.0e-8 # end-custom-isotopics blocks: uo2: &block_uo2 # NEA/NSC/DOC(96)2 Table 1 - Cell geometries grid name: UO2 grid fuel: shape: Circle material: UO2 isotopics: UO2 Tinput: 20.0 Thot: 20.0 od: .8190 latticeIDs: [U] gap 1: &fuel_gap_1 shape: Circle material: Void Tinput: 20.0 Thot: 20.0 id: fuel.od od: zirconium clad.id latticeIDs: [U] zirconium clad: &clad_Zr shape: Circle material: Custom isotopics: Zr clad Tinput: 20.0 Thot: 20.0 id: .8360 od: .9500 latticeIDs: [U] gap 2: &fuel_gap_2 shape: Circle material: Void Tinput: 20.0 Thot: 20.0 id: zirconium clad.od od: aluminum clad.id latticeIDs: [U] aluminum clad: &clad_Al # NEA/NSC/DOC(96)2 Documents: # "This clad is used to simulate hot conditions at room temperature # (decrease the moderation ratio)" shape: Circle material: Custom isotopics: Al clad Tinput: 20.0 Thot: 20.0 id: .9700 od: 1.0800 latticeIDs: [U] moderator: &moderator shape: DerivedShape material: SaturatedWater isotopics: moderator Tinput: 450.0 Thot: 450.0 # Moderator within the guide tube inner moderator guide tube: &guide_tube_moderator shape: Circle material: SaturatedWater isotopics: moderator Tinput: 20.0 Thot: 20.0 od: guide tube.id latticeIDs: [GT] guide tube: &guide_tube shape: Circle material: Custom isotopics: Al clad Tinput: 20.0 Thot: 20.0 id: .6800 od: 1.0800 latticeIDs: [GT] fission chamber guide tube: &fission_chamber_guide_tube <<: *guide_tube # Avoid giving this the same flag as "guide tube" by implementing # a custom flag. This is done to distinguish the "fission chamber guide tube" # from the regular "guide tube". This demonstrates the use of setting # flags directly rather than relying on them to be implied based on the # name. flags: fission chamber structure latticeIDs: [FC] fission chamber: &fission_chamber shape: Circle material: Custom isotopics: fission chamber Tinput: 20.0 Thot: 20.0 od: .8190 # No documentation fission chamber dims of composition latticeIDs: [FC] inner moderator FC: &fission_chamber_mod # No documentation of this either, but assuming fission chamber # has same od as fuel, so there needs to be something in the gap. shape: Circle material: Void Tinput: 20.0 Thot: 20.0 id: fission chamber.od od: guide tube.id latticeIDs: [FC] pitch: &pitch # dummy component for assembly sizing shape: Square material: Void Tinput: 20.0 Thot: 20.0 widthInner: 21.42 widthOuter: 21.42 mult: 1.0 # end-block-uo2 mox: &block_mox grid name: MOX grid mox low fuel: shape: Circle material: UO2 isotopics: mox low Tinput: 20.0 Thot: 20.0 od: .8190 latticeIDs: [ML] mox medium fuel: shape: Circle material: UO2 isotopics: mox medium Tinput: 20.0 Thot: 20.0 od: .8190 latticeIDs: [MM] mox high fuel: shape: Circle material: UO2 isotopics: mox high Tinput: 20.0 Thot: 20.0 od: .8190 latticeIDs: [MH] void 1: <<: *fuel_gap_1 id: mox low fuel.od latticeIDs: [ML, MM, MH] zirconium clad: <<: *clad_Zr latticeIDs: [ML, MM, MH] void 2: <<: *fuel_gap_2 latticeIDs: [ML, MM, MH] aluminum clad: # See Aluminum Clad note above about why there are 2 clads. <<: *clad_Al latticeIDs: [ML, MM, MH] moderator: *moderator inner moderator GT: *guide_tube_moderator guide tube: *guide_tube fission chamber guide tube: *fission_chamber_guide_tube fission chamber: *fission_chamber moderator fission chamber: *fission_chamber_mod pitch: *pitch # end-block-mox moderator: &block_mod moderator: shape: Square material: SaturatedWater isotopics: moderator Tinput: 20.0 Thot: 20.0 widthOuter: 21.42 mult: 1.0 # end-block-mod assemblies: heights: &heights - 64.26 - 64.26 - 64.26 - 21.42 axial mesh points: &mesh - 3 - 3 - 3 - 2 UO2: flags: fuel specifier: UO2 blocks: - *block_uo2 - *block_uo2 - *block_uo2 - *block_mod height: *heights axial mesh points: *mesh xs types: [A, A, A, A] mox: flags: fuel specifier: MOX blocks: - *block_mox - *block_mox - *block_mox - *block_mod height: *heights axial mesh points: *mesh xs types: [A, A, A, A] mod: specifier: MOD blocks: - *block_mod - *block_mod - *block_mod - *block_mod height: *heights axial mesh points: *mesh xs types: [A, A, A, A] # end-assemblies systems: core: grid name: core origin: x: 0.0 y: 0.0 z: 0.0 # end-systems grids: core: symmetry: quarter reflective geom: cartesian lattice pitch: x: 21.42 y: 21.42 lattice map: | MOD MOD MOD MOX UO2 MOD UO2 MOX MOD # end-grid-core UO2 grid: symmetry: full geom: cartesian lattice pitch: x: 1.26 y: 1.26 lattice map: | U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U GT U U GT U U GT U U U U U U U U GT U U U U U U U U U GT U U U U U U U U U U U U U U U U U U U U U U GT U U GT U U GT U U GT U U GT U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U GT U U GT U U FC U U GT U U GT U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U GT U U GT U U GT U U GT U U GT U U U U U U U U U U U U U U U U U U U U U U GT U U U U U U U U U GT U U U U U U U U GT U U GT U U GT U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U # end-grid-UO2 MOX grid: symmetry: full geom: cartesian lattice pitch: x: 1.26 y: 1.26 lattice map: | ML ML ML ML ML ML ML ML ML ML ML ML ML ML ML ML ML ML MM MM MM MM MM MM MM MM MM MM MM MM MM MM MM ML ML MM MM MM MM GT MM MM GT MM MM GT MM MM MM MM ML ML MM MM GT MM MH MH MH MH MH MH MH MM GT MM MM ML ML MM MM MM MH MH MH MH MH MH MH MH MH MM MM MM ML ML MM GT MH MH GT MH MH GT MH MH GT MH MH GT MM ML ML MM MM MH MH MH MH MH MH MH MH MH MH MH MM MM ML ML MM MM MH MH MH MH MH MH MH MH MH MH MH MM MM ML ML MM GT MH MH GT MH MH FC MH MH GT MH MH GT MM ML ML MM MM MH MH MH MH MH MH MH MH MH MH MH MM MM ML ML MM MM MH MH MH MH MH MH MH MH MH MH MH MM MM ML ML MM GT MH MH GT MH MH GT MH MH GT MH MH GT MM ML ML MM MM MM MH MH MH MH MH MH MH MH MH MM MM MM ML ML MM MM GT MM MH MH MH MH MH MH MH MM GT MM MM ML ML MM MM MM MM GT MM MM GT MM MM GT MM MM MM MM ML ML MM MM MM MM MM MM MM MM MM MM MM MM MM MM MM ML ML ML ML ML ML ML ML ML ML ML ML ML ML ML ML ML ML # end-grid-MOX nuclide flags: H: {burn: false, xs: true} O: burn: false xs: true expandTo: ["O16", "O17"] # O18 is not in many nuclear data sets. B: {burn: false, xs: true} AL: {burn: false, xs: true} ZR: {burn: false, xs: true} U235: {burn: false, xs: true} U238: {burn: false, xs: true} PU238: {burn: false, xs: true} PU239: {burn: false, xs: true} PU240: {burn: false, xs: true} PU241: {burn: false, xs: true} PU242: {burn: false, xs: true} AM241: {burn: false, xs: true} # end-nucflags