Yoshimura, Sh.

Towards Peta-Scale Simulation of Nuclear Power Plant Subjected to Large Earthquake

Abstract eng:
In such countries as Japan where earthquake occurs frequently, reliable and sufficient seismic proof design plays a key role in operating nuclear power plants (NPPs) safely and stably. Especially, “Niigataken-Chuetsu-Oki (NCO) earthquake with 6.8 magnitude occurred on July 16, 2007 recalled its practical importance seriously. The JMA intensity of nearly 7 was observed in the site of the Kashiwazaki-Kariwa NPPs of The Tokyo Electric Power Company, and the seismic wave detected on the base mat of the unit 1 reactor building was 680 gal in the east-west direction. During the earthquake, Units 3, 4 and 7 were in full-power operation. In this earthquake, the maximum value of the observed response acceleration exceeded a design limit, and the observed response spectrum exceeded the design spectrum in all frequency range. Although safety-related components were not damaged at all, various damages were observed in non-safety related facilities. As the results, the plants have been stopped over two years.

Contributors:

Murotani, K.

Publisher:

National Technical University of Athens, 2011

Conference Title:

Computational Methods in Structural Dynamics and Earhquake Engineering

Conference Title:

COMPDYN 2011 - 3rd International Thematic Conference

Conference Venue:

Island of Corfu (GR)

Conference Dates:

2011-05-25 / 2011-05-28