[2L01-06] New PRA

[2L04] Development of Integrated Risk Assessment Methodology for External Event

Part 4: Study of dynamic risk assessment method using interaction multi-layer model

*Kenji MORI¹, Hitoshi MUTA¹, Yasuki OHTORI¹ (1. Corporative Major in Nuclear Energy, Graduate School, Tokyo City University)

Keywords:Interaction Multi-Layer Model , STAMP/STPA, Simplified Hybrid Method, External Event, PRA, Nuclear Fuel Facility

In order to implement the risk assessment for severer accidents due to external events such as earthquakes in nuclear fuel facilities, we propose an interaction multi-layer model and a seismic risk assessment method. The former allows for consideration of simultaneous occurrence of multiple accidents and feedback of the time-dependent and spatial impact of component damage and human operations. For the latter, a method based on the magnitude of the risk of nuclear fuel facilities and the status of development of reliability data such as fragility data is applied.