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Study on PRA Procedure Considering Combination of Multiple Events Using DQFM Methodology

[+] Author Affiliations
Hirohisa Yamakawa, Hitoshi Muta

Tokyo City University, Tokyo, Japan

Paper No. ICONE26-82086, pp. V002T14A018; 7 pages
  • 2018 26th International Conference on Nuclear Engineering
  • Volume 2: Plant Systems, Structures, Components, and Materials; Risk Assessments and Management
  • London, England, July 22–26, 2018
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 978-0-7918-5144-9
  • Copyright © 2018 by ASME


Fukushima Daiichi Nuclear Power Station accident occurred by the Great East Japan Earthquake on March 11, 2011. After that, continuous enhancement of nuclear safety is being required in Japan. The accident of Fukushima was caused by the seismic induced tsunami event, namely, multiple events. The other examples of multiple events due to the seismic event are such as internal fire and internal flooding in the nuclear power plants. In addition, structures, such as a building, and piping might be damaged by the seismic event, which could impact component failure dependently. In order to consider these kinds of events, the development of PRA procedures for multiple events caused by the seismic events will be highly demanded. So, we developed a basic PRA methodology for seismic induced tsunami events using “Direct Quantification of Fault Tree using Monte Carlo simulation (DQFM) methodology”. And we verified its applicability through the evaluation.

Copyright © 2018 by ASME



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