JpGU-AGU Joint Meeting 2017

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[JJ] Poster

H (Human Geosciences) » H-CG Complex & General

[H-CG33] [JJ] Design basis ground motion for nuclear power plants: Viewpoints of science and engineering

Sun. May 21, 2017 1:45 PM - 3:15 PM Poster Hall (International Exhibition Hall HALL7)

convener:Daisuke Suetsugu(Department of Deep Earth Structure and Dynamics Research, Japan Agency for Marine-Earth Science and Technology), Manabu Hashimoto(Disaster Prevention Research Institute, Kyoto University), Takeshi Sagiya(Disaster Mitigation Research Center, Nagoya University), Kohta Juraku(Department of Humanities, Social and Health Sciences, School of Science and Technology for Future Life, Tokyo Denki University)

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[HCG33-P02] Problems on the volcanic hazard simulation for safty evaluation of the nuclear power plant site

*Nobuo HAMADA1 (1.none)

Keywords:Titan2d, Tephra2, Mogi's Model

Japanese electric power companies(EPCs) have been submitting materials for safety reviews of their nuclear power plants(NPPs) to the National Regulatory Authority(NRA). Among the submitted materials, we are able to find volcanic hazard assessment results for NPP sites based on the applications of volcanic hazard simulation programs and models. Among them, Titan2d is a program for pylocrastc flow simulation and Tephra2 is a simulation program for fallout of volcanic ejecta from a volcanic column. Mogi’s model is an assessment formula for ground deformation induced by internal stress change of magma reservoirs. However, applications of the programs and formula by EPCs show inappropriate or wrong use of them when physical process and boundary conditions for them are concerned and resultant volcanic hazard assessments must be almost meaningless for safety review of NPPs.