Research Article
SCALE Modeling of Selected Neutronics Test Problems within the OECD UAM LWR’s Benchmark
Table 1
Pin-cell data for the test cases of Exercises I-1 and Exercise I-2.
| | Parameter | BWR | PWR | VVER | KRITZ-2 : 1 | GEN-III |
| | FA geometry | | | — | — | | | FA pitch (mm) | 152.4 | 218.11 | — | — | 216.1 | | Fuel rods per assembly | 49 | 208 | — | — | 265 | | Number of guide tubes per FA | — | 16 | — | — | 24 | | Number of instrumentation tubes per FA | — | 1 | — | — | — | | Number of Gd pins per FA | — | 4 | — | — | — | | Guide tube outside diameter (mm) | — | 13.462 | — | — | 12.07 | | Guide tube inside diameter (mm) | — | 12.649 | — | — | 11.27 | | Instrumentation tube outside diameter (mm) | — | 12.522 | — | — | — | | Instrumentation tube inside diameter (mm) | — | 11.201 | — | — | — | | Unit cell (mm) | 18.75 | 14.427 | 12.75 | 14.85 | 12.62 | | Fuel pellet diameter (mm) | 12.1158 | 9.391 | 7.56 | 10.58 | 8.253 | | Fuel pellet material | UO2 | UO2 | UO2 | UO2 | MOX | | Fuel density (g/cm3) | 10.42 | 10.283 | 10.4 | — | — | | Fuel enrichment (w/o) | 2.93 | 4.85 | 3.3 | 1.86 | 9.8 (Pu) | | Central void diameter (mm) | — | — | 1.4 | — | — | | Central void material | — | — | Dry air | — | — | | Cladding outside diameter (mm) | 14.3002 | 10.928 | 9.1 | 12.25 | 9.487 | | Cladding thickness (mm) | 0.9398 | 0.673 | 0.69 | 0.74 | 0.578 | | Cladding material | Zircaloy-2 | Zircaloy-4 | Zr + 1% Nb | Zircaloy-2 | Zircaloy-4 | | Cladding density (g/cm3) | 6.55 | 6.55 | — | — | — | | Gap material | He | He | He | He | He | | Moderator material | H2O | H2O | H2O | H2O | H2O | | Fuel temperature (K) | | | | | | | HZP | 552.833 | 551 | 552.15 | 292.7 | — | | HFP | 900 | 900 | 900 | 521.5 | 900 | | Cladding temperature (K) | | | | | | | HZP | 552.833 | 551 | 552.15 | — | — | | HFP | 600 | 600 | 600 | — | 610 | | Moderator temperature (K) | | | | | | | HZP | 552.833 | 551 | 552.15 | — | — | | HFP | 557 | 562 | 560 | — | 584 | | Moderator density (kg/m3) | | | | | | | HZP | 753.978 | 766 | 767 | — | — | | HFP | 460.72 | 748.4 | 752.5 | — | — |
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