Estimation of biases and uncertainties on PWR nuclide inventories for severe accidents analyses

被引：1

作者：

Ichou, R. ^{[1
]}

Clavel, J. B. ^{[1
]}

Bonthoux, S. ^{[1
]}

Bernard, F. ^{[1
]}

Taforeau, J. ^{[1
]}

Malvagi, F. ^{[1
]}

机构：

[1] Inst Radioprotect & Surete Nucl, PSN RES SNC LN, Fontenay Aux Roses, France

来源：

FRONTIERS IN ENERGY RESEARCH | 2023年 / 11卷

关键词：

bias; uncertainty; inventories; accidents; VESTA; CASMO; NUCLEAR-DATA; SCIENCE; LIBRARY;

D O I：

10.3389/fenrg.2023.1033306

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The work presented in this paper deals with bias and uncertainty quantification on nuclear fuel inventory in a pressurized water reactors core during normal operation. This actinides and fission products inventory is used as input data for radiological releases evaluation in case of a severe accident. The different sources of bias and uncertainty, as well as their impacts for UO2 and MOX fuel at the assembly and core levels, are discussed. Uncertainty sources include technological uncertainties (e.g. dimensions, irradiation history, temperatures), modeling assumptions, uncertainties related to the resolution methods used in the calculation tools and nuclear data uncertainties. For each source of uncertainty investigated in this paper, an evaluation of the associated biases and uncertainties on nuclide inventory is performed. It is shown that, among the sources of bias and uncertainties studied, spread due to nuclear data as well as the bias and uncertainties due to "infinite lattice approximation " are the most significant ones, for the isotopes of interest.

引用

页数：16

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