Sensitivity and uncertainty analysis for UO2 and MOX fueled PWR cells

被引：11

作者：

Foad, Basma ^{[1
,2
]}

Takeda, Toshikazu ^{[1
]}

机构：

[1] Univ Fukui, Res Inst Nucl Engn, Tsuruga, Fukui 9140055, Japan

[2] Egypt Nucl & Radiol Regulatory Author, Cairo 11787, Egypt

来源：

ANNALS OF NUCLEAR ENERGY | 2015年 / 75卷

关键词：

Sensitivity; Uncertainty; IR approximation; Self-shielding; PWR; COEFFICIENTS;

D O I：

10.1016/j.anucene.2014.08.068

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：

This paper discusses the improvement of a method for calculating sensitivity coefficients of neutronics parameters relative to infinite dilution cross-sections because the conventional method neglects resonance self-shielding effect. In this study, the self-shielding effect is taken into account by using the intermediate resonance approximation in order to get accurate results in both high and low energy groups. The improved method is applied to calculate sensitivity coefficients and uncertainties of eigenvalue responses for UO2 and MOX (ThO2-UO2 and PuO2-UO2) fueled pressurized water reactor cells. The verification of the improved method was performed by comparing the sensitivities with MCNP6 and TSU-NAMI-1D. For uncertainty, calculation comparisons were done with TSU-NAMI-1D, and we demonstrate that the differences are caused by the use of different covariance matrices. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：595 / 604

页数：10

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