Dependency is one of the most important issues in human reliability analysis(HRA).However,the existing dependency analysis methods have some problems,such as lack of basic data,insufficient cognitive theoretical foundation,and unclear selection principles of influencing factor levels,which lead to overly conservative analysis results and poor stability.For this reason,the Nuclear Regulatory Commission(NRC)of the United States established the IDHEAS dependency model based on the behavioral cognitive model of IDHEAS,and put forward the IDHEAS dependency analysis method(IDHEAS-DEP).In this paper,IDHEAS-DEP is systematically studied,the implementation process and key points are analyzed and summarized,and a typical category C human factor event group of Level 1 probabilistic safety analysis(PSA)is selected for example analysis,and a quantitative comparison is made with other dependency analysis methods.Theoretical research and case analysis show that IDHEAS-DEP can solve the problems of insufficient basic theory and conservative analysis results of existing dependency analysis methods to a certain extent,and the screening analysis of this method is more universal and practical in engineering.However,it still needs to solve the interface problem with other HRA methods,and the determination of the minimum joint human error probability is also the direction that this method needs to be improved in the future.
Human reliability analysis(HRA)DependencyIntegrade human event analysis system(IDHEAS)
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