Assessment of the MPACT Resonance Data Generation Procedure

Technical Report · Sun Dec 25 23:00:00 EST 2016

DOI:https://doi.org/10.2172/1351757· OSTI ID:1351757

Kim, Kang Seog ^[1]; Williams, Mark L. ^[1]

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

Currently, heterogeneous models are being used to generate resonance self-shielded cross-section tables as a function of background cross sections for important nuclides such as ²³⁵U and ²³⁸U by performing the CENTRM (Continuous Energy Transport Model) slowing down calculation with the MOC (Method of Characteristics) spatial discretization and ESSM (Embedded Self-Shielding Method) calculations to obtain background cross sections. And then the resonance self-shielded cross section tables are converted into subgroup data which are to be used in estimating problem-dependent self-shielded cross sections in MPACT (Michigan Parallel Characteristics Transport Code). Although this procedure has been developed and thus resonance data have been generated and validated by benchmark calculations, assessment has never been performed to review if the resonance data are properly generated by the procedure and utilized in MPACT. This study focuses on assessing the procedure and a proper use in MPACT.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Consortium for Advanced Simulation of LWRs (CASL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1351757
• Report Number(s): ORNL/SR--2016/360; NT0304000; NEAF343; CASL-U-2016-1164-000
• Country of Publication: United States
• Language: English

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