[3C01-06] Quake-resistant and Seismic Isolation Technologies

[3C02] Development of seismic counter measures against cliff edges for enhancement of comprehensive safety of nuclear power plants

Part7: Cliff edges relevant to NPP building response

*Akemi Nishida¹, Byunghyun Choi¹, Hidemasa Yamano¹, Tsuyoshi Takada² (1. JAEA, 2. The Univ. of Tokyo)

Keywords:Nuclear power plant, Building system, Cliff edges, Defense in depth

In this research, the seismic safety of nuclear power plants (NPP) is treated as a system in which the various cliff edge effects are identified and quantified based on the concepts of risk and defense in depth. A methodology is then developed for avoiding these cliff edge effects. In order to examine how the cliff edge state specified in the seismic response analysis of the building system depends on the modeling factor, we investigated the seismic iresponse of the NPP building for seismic input waves beyond design, etc. In this paper, we describe these results and discuss about them.