https://doi.org/10.1051/epjconf/202124702038
IMPLEMENTATION OF 2D/1D GAMMA TRANSPORT AND GAMMA HEATING CAPABILITY IN MPACT
1 University of Michigan 2355 Bonisteel blvd, Ann Arbor, MI, 48109
2 Oak Ridge National Laboratory 1 Bethel Valley Rd, Oak Ridge, TN, 37830
wxinyan@umich.edu
yuxuanl@umich.edu
wrm@umich.edu
stimpsonsg@ornl.gov
Published online: 22 February 2021
This paper presents the most recent progress on the development of gamma transport capability for the CASL neutronics code MPACT: (1) 3D gamma transport and (2) explicit gamma heating capabilities. The 3D gamma calculation capability was implemented by leveraging the 2D/1D solver originally developed for neutron calculations. The results were verified by MCNP6 on a small assembly with 5 × 5 pins. Generally, errors were lower than 0.5% on each axial mesh as long as MPACT was running with enough axial meshes. The gamma heating calculation considered the energy deposition from photoelectric absorption, Compton scattering, and pair production. Verification with MCNP6 for both 2D and 3D benchmarks showed that the errors of energy depositions are comparable with those of gamma fluxes, proving the proper implementation of the energy deposition.
Key words: MPACT / Gamma Transport / 2D/1D / Energy Depositions
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
