Impact of H in H2O thermal scattering data on criticality calculation: uncertainty and adjustment

IF 0.9 Q3 NUCLEAR SCIENCE & TECHNOLOGY
D. Rochman, A. Vasiliev, H. Ferroukhi, A. Koning, J. Sublet
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引用次数: 4

Abstract

In this paper, the impact of the thermal scattering data for H in H20 is estimated on criticality benchmarks, based on the variations of the CAB model parameters. The Total Monte Carlo method for uncertainty propagation is applied for 63 keff criticality cases, sensitive to H in H20. It is found that their impact is of a few tenth of pcm, up to 300 pcm maximum, and showing highly non-linear distributions. In a second step, an adjustment is proposed for these thermal scattering data, leading to a better agreement between calculated and experimental keff values, following an increase of scattering contribution. This work falls into the global approach of combining advanced theoretical modelling of nuclear data, followed by possible adjustment in order to improve the performances of a nuclear data library.
H in H2O热散射数据对临界计算的影响:不确定性和调整
本文基于CAB模型参数的变化,在临界基准上估计了热散射数据对H20中H的影响。不确定性传播的全蒙特卡罗方法应用于63个临界情况,对H20中的H敏感。研究发现,它们的影响仅为pcm的十分之一,最大可达300pcm,且呈高度非线性分布。第二步,在散射贡献增加后,对这些热散射数据进行调整,使计算值和实验值之间的一致性更好。这项工作属于将核数据的先进理论建模结合起来的全球方法,然后进行可能的调整,以提高核数据库的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
EPJ Nuclear Sciences & Technologies
EPJ Nuclear Sciences & Technologies NUCLEAR SCIENCE & TECHNOLOGY-
CiteScore
1.00
自引率
20.00%
发文量
18
审稿时长
10 weeks
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