Quantification Method of Cognitive Error and Its Application in PSA

Cognitive Reliability and Error Analysis Method （CREAM） is one of the representative second-generation human reliability analysis methods.The CREAM quantitfication analysis is improved based on the core thought of CREAM,and the performance influence index of the common performance condition （CPC） on human reliability and the context influence index which quantifies the effect of the con- text on human error are presented.A quantification method of the error probabilities for the human failure events in probability safety assess （PSA） is provided,and it is applied in the error probability analysis for the human actions in the identification and isolation of the ruptured steam generator tube of nuclear power plants.