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http://dx.doi.org/10.1016/j.net.2018.04.005

Multi-unit Level 2 probabilistic safety assessment: Approaches and their application to a six-unit nuclear power plant site  

Cho, Jaehyun (Korea Atomic Energy Research Institute)
Han, Sang Hoon (Korea Atomic Energy Research Institute)
Kim, Dong-San (Korea Atomic Energy Research Institute)
Lim, Ho-Gon (Korea Atomic Energy Research Institute)
Publication Information
Nuclear Engineering and Technology / v.50, no.8, 2018 , pp. 1234-1245 More about this Journal
Abstract
The risk of multi-unit nuclear power plants (NPPs) at a site has received considerable critical attention recently. However, current probabilistic safety assessment (PSA) procedures and computer code do not support multi-unit PSA because the traditional PSA structure is mostly used for the quantification of single-unit NPP risk. In this study, the main purpose is to develop a multi-unit Level 2 PSA method and apply it to full-power operating six-unit OPR1000. Multi-unit Level 2 PSA method consists of three steps: (1) development of single-unit Level 2 PSA; (2) extracting the mapping data from plant damage state to source term category; and (3) combining multi-unit Level 1 PSA results and mapping fractions. By applying developed multi-unit Level 2 PSA method into six-unit OPR1000, site containment failure probabilities in case of loss of ultimate heat sink, loss of off-site power, tsunami, and seismic event were quantified.
Keywords
Large Early Release Frequency; Level 2 Probabilistic Safety Assessment; Method; Multi-unit Probabilistic Safety Assessment; Seismic Event; Site Containment Failure Probability; Site Risk; Tsunami Event;
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Times Cited By KSCI : 1  (Citation Analysis)
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