核安全2024，Vol.23Issue(2)：29-36,8.
非能动核电厂SBO事故风险重要序列耦合定量化
Coupling Quantification of SBO Risk Significant Sequences of Passive NPP
摘要
Abstract
Risk-informed safety margin characteristic methodology(RISMC)aims at evaluating the dynamic accident process,accident probability and core damage frequency of accident sequence by using the method of coupling probability safety analysis and deterministic safety analysis.This method requires to deal with stochastic uncertainty parameters and epistemic uncertainty parameters at the same time.In this paper,the RISMC method is used to re-quantify the core damage frequency of risk significant sequence in Station Black Out(SBO)accident of passive nuclear power plant with the coupling way.A risk significant sequence S is chosen as analysis subject.After removing the success criterion of the important system heading,the sequence has been developed to a discrete event tree to be detail analyzed.By considering and sampling the uncertainty of both the random parameters and the epistemic parameters,lots of thermal-hydraulic condition has been modeled with system coeds.A new core damage frequency(CDF)coupled with sequence frequency and exceedance probability based on RISMC has been obtained.The CDF of the important sequence of SBO accident risk has a certain degree of decline,indicating that there is a certain conservatism in the original probabilistic safety analysis(PSA),and the constructive suggestions for operators responding to the SBO accident are put forward by calculation and analysis conclusions.关键词
风险指引/概率安全分析/非能动核电厂/全厂断电Key words
risk informed/PSA/passive NPP/station black out分类
能源科技引用本文复制引用
杜芸,刘镝,卓钰铖,张琴芳..非能动核电厂SBO事故风险重要序列耦合定量化[J].核安全,2024,23(2):29-36,8.基金项目
国家重点研发计划——风险指引的安全裕度特性分析技术研究项目,项目编号:2018YFB1900304 （）
