Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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CURRENT ISSUES ON PRA REGARDING SEISMIC AND TSUNAMI EVENTS AT MULTI UNITS AND SITES BASED ON LESSONS LEARNED FROM TOHOKU EARTHQUAKE/TSUNAMI

  • Received : 2012.05.07
  • Published : 2012.06.25
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Abstract

The Tohoku earthquake (Mw9.0) occurred on March 11, 2011 and caused a large tsunami. The Fukushima Dai-ichi NPP (F1-NPP) were overwhelmed by the tsunami and core damage occurred. This paper describes the overview of F1-NPP accident and the usability of tsunami PRA at Tohoku earthquake. The paper makes reference to the following current issues: influence on seismic hazard of gigantic aftershocks and triggered earthquakes, concepts for evaluating core damage frequency considering common cause failure with correlation coefficient against seismic event at multi units and sites, and concepts of "seismic-tsunami PSA" considering a combination of seismic motion and tsunami effects.

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References

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