Abstract
For some fuel depletion and performance simulations, temperature-dependent rings of fuel are preferred. This has typically required long-running CENTRM pointwise slowing down calculations. FAST, the US Nuclear Regulatory Commission (NRC) fuel performance code, is being coupled with the SCALE code package for neutronic calculation, which requires very fast cross section processing for multiple fuel zones with nonuniform temperature distribution. The XSProc-BONAMI procedure is very fast, but it does not work for the specified problem because the Bondarenko resonance self-shielding method in BONAMI does not produce correct self-shielded multigroup cross sections for multiple fuel rings with nonuniform temperature profiles. A spatially dependent self-shielding method based on Dancoff factors has been implemented into BONAMI to correctly predict local powers inside fuel pellets, as well as eigenvalue for multiple fuel zones for uniform and nonuniform temperature distributions. Implementing the new method drastically improves prediction of multiplication factors and fission densities compared to results obtained with the reference continuous-energy Monte Carlo calculations.
| Original language | English |
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| Title of host publication | Proceedings of the International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M and C 2021 |
| Publisher | American Nuclear Society |
| Pages | 2325-2331 |
| Number of pages | 7 |
| ISBN (Electronic) | 9781713886310 |
| DOIs | |
| State | Published - 2021 |
| Event | 2021 International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M and C 2021 - Virtual, Online Duration: Oct 3 2021 → Oct 7 2021 |
Publication series
| Name | Proceedings of the International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M and C 2021 |
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Conference
| Conference | 2021 International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M and C 2021 |
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| City | Virtual, Online |
| Period | 10/3/21 → 10/7/21 |
Funding
This research was supported by the US Nuclear Regulatory Commission Office of Research. This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan). This research was supported by the US Nuclear Regulatory Commission Office of Research. Notice: This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).
Keywords
- BONAMI
- Spatially dependent self-shielding
- nonuniform temperature