Development of a quantitative safety analysis model for the integrated system of I and C systems, MMI, and human operators

To make PSA more realistic, the improvements of HRA are essential. But, current HRA methods have many limitations including the lack of considerations on the interdependency between I and C systems and human operators, and lack of theoretical basis for the situation assessment of human operators. To overcome these limitations, we develop a quantitative model for the reliability analysis of the integrated system which consists of I and C systems, MMI, and human operators. The proposed model is developed in the framework of Bayesian networks, based on the RGGG method and the quantitative model for the situation assessment of human operators. The proposed model is expected to increase the reality of PSA, by increasing the reality of HRA in the framework of PSA