[1I01-08] PRA Method 1

4:30 PM - 4:45 PM JST(7:30 AM - 7:45 AM UTC)

[1I08] Development of Probabilistic Risk Assessment Methods for multiple tanks and multiple events at the Rokkasho Reprocessing Plant(4) Study of methods for assessment the risk importance with the effects of radiation exposure

*Masahiro Yamamoto^1,4, Kazumi Takebe¹, Takashi Kodama¹, Futoshi Tanaka², Asei Kawasaki³, Hidetaka Nagata², Isao Hongo², Makoto Takahashi⁴ (1. JNFL, 2. MHI, 3. MHI NSE, 4. Tohoku Univ.)

Keywords:

PRA,Multiple units,Multiple events,Reprocessing Plant,Risk importance

In order to identify vulnerable points of equipments and operations related to severe accidents by utilizing risk assessment, we are developing a method that can accurately evaluate the frequency of simultaneous occurrence of multiple tanks and multiple events.
This paper reports the results of the study on the evaluation method of risk importance that can be considered accident frequency and exposure effects.