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research-article

Risk Analysis of Spent Fuel Pool Caused by Seismic Events

[+] Author and Article Information
Ming Wang

State Key Laboratory of Nuclear Power Monitoring Technology and Equipment, China Nuclear Power Engineering Co. Ltd., Shenzhen of Guangdong Prov. 518172, China
wangming_2010@cgnpc.com.cn

Modi Lin

China Nuclear Power Engineering Co. Ltd., Shenzhen of Guangdong Prov. 518172, China
linmodi@cgnpc.com.cn

Jinkai Wang

China Nuclear Power Design Co. Ltd., Shenzhen of Guangdong Prov. 518172, China
wangjinkai@cgnpc.com.cn

1Corresponding author.

ASME doi:10.1115/1.4040367 History: Received October 31, 2017; Revised May 13, 2018

Abstract

Spent fuel pool stores fuel assemblies removed from the reactor over the years. In the event of an earthquake, spent fuel pool and its accident mitigation measures may fail at the same time, which can cause serious accident consequences. Based on the design and operation characteristics of typical CPR1000 nuclear power plant, this paper uses probability safety assessment method to quantitatively evaluate the risk of spent fuel pool caused by seismic events, and identify the weaknesses in the design and operation of the nuclear power plant. Quantitative analysis results show that spent fuel pool damage frequency caused by seismic events is lower than core damage frequency caused by seismic events. The main risks come from the collapse of fuel building and structural damage of the spent fuel pool. In addition, seismic events affect both reactor core and spent fuel pool, Water vapor and radioactive materials from spent fuel pool accident have an adverse effect on mitigation of core accident.

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