[3F08-13] External PRA

[3F09] A Framework of RI-PB Design Application for Seismic Events

Part7: Study on the Balanced Risk Profile

*Toshiaki Sakai¹, Yasuki Ohtori², Yoshifumi Katayama³, Hitoshi Muta² (1. CRIEPI, 2. TCU, 3. Chuden Engineering Consultants CO.,LTD)

Keywords:RI-PB, Risk Profile, Defence-in-Depth, Natural External hazard

This paper describes a methodology and case study results of balanced risk profile against seismic motion. Achievement of balanced risk profile is an important position to secure the nuclear safety in terms of Defence-in- Depth considering a large uncertainty of natural external hazard. Proposed methodology is developed based on the fault tree analysis which is utilized in a system analysis in PRA (Probabilistic Risk Assessment).