Uncertainty propagation from n+56Fe nuclear reaction model parameters to neutron multiplication factor

被引：5

作者：

Chen, Shengli ^{[1
,2
,3
]}

Vandermeersch, Elias ^{[2
,3
]}

Tamagno, Pierre ^{[2
]}

Bernard, David ^{[2
]}

Noguere, Gilles ^{[2
]}

Blaise, Patrick ^{[4
]}

机构：

[1] Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai 519082, Guangdong, Peoples R China

[2] CEA, LEPh, SPRC, IRESNE,DES,DER, F-13108 Cadarache, St Paul Les Dur, France

[3] Univ Grenoble Alpes, I MEP2, F-38402 St Martin Dheres, France

[4] CEA, Sci Direct, DES, F-91191 Gif Sur Yvette, France

来源：

ANNALS OF NUCLEAR ENERGY | 2021年 / 163卷

关键词：

Uncertainty propagation; Nuclear model parameters; Effective multiplication factor (k(eff)); n+Fe-56 nuclear reactions; Stainless steel reflector;

D O I：

10.1016/j.anucene.2021.108553

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Nuclear data are the main uncertainty sources for modern neutron transport calculations. However, complete correlation matrices among different nuclear data are not presented in the current evaluations. In order to completely consider that correlation between nuclear data, the present work propagates the covariance matrix of continuum n+Fe-56 reaction model parameters to the effective neutron multiplication factor (k(eff)) of a thermal neutron spectrum benchmark and a fast neutron spectrum benchmark. Results show that the uncertainty propagated from angular distribution is not negligible. The general correlations between angular distributions and cross sections of( 56)Fe for neutron energies above 850 keV are respectively -0.39 +/- 0.05 and -1.02 +/- 0.02 for k(eff) calculation in the thermal and fast benchmarks, respectively. These correlations reveal the importance of a complete correlation matrix of nuclear data for propagating uncertainties to neutronic calculations. (C) 2021 Elsevier Ltd. All rights reserved.

引用

页数：11

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