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Demonstration of Coupled Tiamat Single Assembly Calculations

Technical Report ·
DOI:https://doi.org/10.2172/3004267· OSTI ID:3004267
 [1];  [1];  [1];  [1];  [2];  [2];  [3];  [3];  [3];  [3]
  1. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  3. Idaho National Laboratory (INL), Idaho Falls, ID (United States)
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This report corresponds to milestone L3:PHI.PCI.P15.03, which was originally intended to investigate the time discretization approaches with the newly developed fully coupled Tiamat capability, targeting single assembly problems. At the time, it was thought that various time discretization approaches would need to be assessed. However, it was decided that this was not necessary as what is currently implemented in the code is adequate to provide consistent and full coupling between MPACT, CTF, ORIGEN, and Bison. As such, the milestone has effectively been repurposed as a stepping stone to the quarter core demonstration milestone slated for completion in August by describing and demonstrating the new fully coupled Tiamat capability on a single assembly case based on VERA Progression Problem 6, but with the addition of depletion throughout a representative cycle. Additionally, several other contributions that have been critical to this demonstration are also described. These include (1) the 1.5D capability developed by the Bison team, (2) improvements to the burnup representation in Bison through Tiamat, and (3) the additions to MOOSE to allow Bison to resolve the same timestep are also discussed. Initial simulations have been performed for the Watts Bar Unit 1 Cycle 1 with fully coupled Tiamat. While there are a few things to be improved for the final simulations, the initial results look very promising. The current status and results from this will be presented here, as well as the path forward to resolve the issues observed.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE)
DOE Contract Number:
AC05-00OR22725
OSTI ID:
3004267
Report Number(s):
CASL-U--2017-1357-000
Country of Publication:
United States
Language:
English

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