TY - GEN
T1 - Analysis of the beavrs benchmark using the triton/parcs/paths two-step sequence
AU - O'Grady, Daniel
AU - Kozlowski, Tomasz
AU - Hudson, Nathanael
N1 - Publisher Copyright:
Copyright © (2018) by PHYSOR 2018.
PY - 2018
Y1 - 2018
N2 - The current generation of fast-running whole-core, coarse-mesh nodal methods will remain the most practical methods for reactor depletion in the near term, despite considerable interest and effort in high-fidelity methods taking advantage of increased computational resources. In this work, the TRITON/PARCS/PATHS two-step sequence was used to model the BEAVRS benchmark. Additionally, cross-section uncertainties were propagated throughout the procedure using Sampler/TRITON/PARCS/PATHS. Comparisons were made between the predicted core response and the reported values for low power physics tests, critical boron concentrations, and detector responses. It is observed that the TRITON/PARCS/PATHS two-step procedure shows good agreement to the measured quantities, with an average critical boron discrepancy of 23 ppm and 18 ppm for the first and second cycles, respectively. The cross-section uncertainty is observed to have a large effect on the criticality, with an average standard deviation of 40 ppm and 45 ppm for the critical boron concentrations in the first and second cycles, respectively. In addition, comparisons to the measured flux maps show consistent agreement, with an average radial Root Mean Square relative error (RMS) of 3.25% for the first cycle and 3.06% for the second cycle. The effect of cross-sectional uncertainties is observed to be much weaker on the flux comparisons for each cycle as the average standard deviation of the radial RMS values were 0.38% and 0.35%, respectively.
AB - The current generation of fast-running whole-core, coarse-mesh nodal methods will remain the most practical methods for reactor depletion in the near term, despite considerable interest and effort in high-fidelity methods taking advantage of increased computational resources. In this work, the TRITON/PARCS/PATHS two-step sequence was used to model the BEAVRS benchmark. Additionally, cross-section uncertainties were propagated throughout the procedure using Sampler/TRITON/PARCS/PATHS. Comparisons were made between the predicted core response and the reported values for low power physics tests, critical boron concentrations, and detector responses. It is observed that the TRITON/PARCS/PATHS two-step procedure shows good agreement to the measured quantities, with an average critical boron discrepancy of 23 ppm and 18 ppm for the first and second cycles, respectively. The cross-section uncertainty is observed to have a large effect on the criticality, with an average standard deviation of 40 ppm and 45 ppm for the critical boron concentrations in the first and second cycles, respectively. In addition, comparisons to the measured flux maps show consistent agreement, with an average radial Root Mean Square relative error (RMS) of 3.25% for the first cycle and 3.06% for the second cycle. The effect of cross-sectional uncertainties is observed to be much weaker on the flux comparisons for each cycle as the average standard deviation of the radial RMS values were 0.38% and 0.35%, respectively.
KW - BEAVRS
KW - PARCS
KW - SCALE
KW - Uncertainty Analysis
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M3 - Conference contribution
AN - SCOPUS:85069960858
T3 - International Conference on Physics of Reactors, PHYSOR 2018: Reactor Physics Paving the Way Towards More Efficient Systems
SP - 2501
EP - 2511
BT - International Conference on Physics of Reactors, PHYSOR 2018
PB - Sociedad Nuclear Mexicana, A.C.
T2 - 2018 International Conference on Physics of Reactors: Reactor Physics Paving the Way Towards More Efficient Systems, PHYSOR 2018
Y2 - 22 April 2018 through 26 April 2018
ER -