Development of the V4.2m5 and V5.0m0 Multigroup Cross Section Libraries for MPACT for PWR and BWR

Abstract

Development of the v4.2m5 and v5.0m0 MG Cross Section Libraries for MPACT CASL-U-2017-1280-000 v Consortium for Advanced Simulation of LWRs Development of the v4.2m5 and v5.0m0 MG Cross Section Libraries for MPACT CASL-U-2017-1280-000 1 Consortium for Advanced Simulation of LWRs Development of the v4.2m5 and v5.0m0 MG Cross Section Libraries for MPACT Consortium for Advanced Simulation of LWRs 2 CASL-U-2017-1280-000 2. ACCURACY GOALS Development of the v4.2m5 and v5.0m0 MG Cross Section Libraries for MPACT CASL-U-2017-1280-000 5 Consortium for Advanced Simulation of LWRs Development of the v4.2m5 and v5.0m0 MG Cross Section Libraries for MPACT Consortium for Advanced Simulation of LWRs 10 CASL-U-2017-1280-000 Development of the v4.2m5 and v5.0m0 MG Cross Section Libraries for MPACT CASL-U-2017-1280-000 13 Consortium for Advanced Simulation of LWRs Development of the v4.2m5 and v5.0m0 MG Cross Section Libraries for MPACT

Verification and validation of the high-resolution code nTF with VVER-1000 hot zero power monte carlo calculations and experimental data

“…Overall, the eigenvalue comparison suggests a good agreement of the nTF and Serpent2 libraries since it remains well below the target accuracy (<200 pcm) set by literature for the verification of deterministic codes (Kim, et al, 2017) for all models. With P0, nTF overestimates the eigenvalue in all cases, except the Gd pins and the 1.3 % enriched fuel.…”

“…As it was discussed in (Papadionysiou et al, 2021), the map of the pin power difference for model I produces its maximum at 7.6 % on the pins neighboring the reflector. This is a significant discrepancy (>3%) according to literature for the verification of deterministic codes (Kim, et al, 2017). However, the corresponding RMS equals 1.1 % remaining within target accuracy (<1.5 %).…”

VERA-CS Verification & Validation Plan

“…Outside this range, base cross sections from the library (only a function of temperature) are directly used to compute the macroscopic cross section of a material region. Most recently, the V4.2m5 and V5.0m0 Multigroup Cross Section Libraries for MPACT have been released for PWR and BWR as described in [Kim, 2017].…”

“…Significant progress was made in FY16 to formalize the methodology for generating the multi-group cross section library for MPACT [Kim, 2016]. This past year the methodology was successfully implemented in the generation of a new 51-group library [Kim, 2017]. The CASL library has matured and testing has substantiated the ability of the library to model the range of PWR conditions necessary for core follow.…”

VERA-CS User Support Activities for PoR 14

“…The additional features and evaluation is indirect user support. For a complete description of this milestone work please see the milestone report [2]. A list of relevant tickets is provided in the table below.…”