SUBGR: A Program to Generate Subgroup Data for the Subgroup Resonance Self-Shielding Calculation

Kim, Kang Seog¹ 

[1] Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

关键词: WATER MODERATED REACTORS;    RESONANCE;    SELF-SHIELDING;    WATER COOLED REACTORS;    CROSS SECTIONS;    APPROXIMATIONS;    DATA;    M CODES;    ENERGY RANGE;    SIMULATION;    S CODES;    ENERGY LEVELS;   

DOI  :  10.2172/1261346
RP-ID  :  ORNL/TM--2016/154
RP-ID  :  CASL-U--2016-1071-000
PID  :  OSTI ID: 1261346
Others  :  Other: NT0304000
Others  :  NEAF343
Others  :  CASL-U-2016-1070-000
Others  :  TRN: US1601587

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来源: SciTech Connect

【 摘 要 】

The Subgroup Data Generation (SUBGR) program generates subgroup data, including levels and weights from the resonance self-shielded cross section table as a function of background cross section. Depending on the nuclide and the energy range, these subgroup data can be generated by (a) narrow resonance approximation, (b) pointwise flux calculations for homogeneous media; and (c) pointwise flux calculations for heterogeneous lattice cells. The latter two options are performed by the AMPX module IRFFACTOR. These subgroup data are to be used in the Consortium for Advanced Simulation of Light Water Reactors (CASL) neutronic simulator MPACT, for which the primary resonance self-shielding method is the subgroup method.