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Quantitative risk assessment of accident managements against volcano ash hazard in a sodium-cooled fast reactor

Suzuki, Minoru*; Sakai, Takaaki*; Takata, Takashi ; Doda, Norihiro 

With an aim to establish a quantitative risk assessment of accident managements (AMs) for various external hazards, the plant dynamics analyses with Continuous Markov Chain Monte Carlo (CMMC) method were carried out to assess repeatedly occurred multi-failures by volcano ash in volcanic eruption event. AM repetition of the filter exchange to recover the cooling function of the air coolers were considered. The results showed that this method can evaluate the effectiveness of AM measures against volcanic ash fall events with respect to time progress.

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