我が国における人間信頼性解析の改善状況
概要
In Japan, after the Fukushima Daiichi Nuclear Power Plant accident due to the Great East Japan Earthquake, in addition to risk assessment by traditional conservative approaches, Probabilistic Risk Assessment (PRA) has been used to deal with residual risk caused by extremely rare events. As the evaluation techniques for risk such as external hazards and building/component fragility have been improved, the influence of Human Failure Event (HFE) on overall risk has relatively increased, thus the importance of Human Reliability Analysis (HRA) is increasing. For improving HRA in Japan, Nuclear Risk Research Center (NRRC) has compiled qualitative analysis methods to collect plant-specific and scenario-specific conditions that affect human performance as “narratives,” reflecting the latest research trend, and developed models for analysis on extreme conditions. This paper introduces the concept of qualitative analysis with emphasis on narratives and evaluation examples of tasks under extreme conditions.
