An integrated modeling approach for event sequence development in multi-unit probabilistic risk assessment

Sai Zhang, Jiejuan Tong and Jun Zhao

Reliability Engineering and System Safety, 2016, vol. 155, issue C, 147-159

Abstract: To obtain a complete site risk profile for multi-unit nuclear power plants (NPPs), the existing single-unit probabilistic risk assessment (PRA) model needs to be upgraded to address both intra-unit and inter-unit dependencies. The high temperature gas cooled reactor-pebble bed module (HTR-PM), with two reactor-steam generator modules and one shared steam turbine-generator set, is a ready-in-hand pilot for multi-unit PRA (MUPRA) studies. In this paper, a general framework for MUPRA is firstly developed based on HTR-PM PRA methodology. An Integrated Modeling (IM) approach is then proposed for multi-unit event sequence modeling. The approach is discussed in detail and illustrated with a loss of offsite power (LOOP) case study. Also, the limitations of the current analysis are put forward for open discussion.

Keywords: Nuclear power plant; Multi-unit site; Probabilistic risk assessment; High temperature gas cooled reactor; Intra and inter unit common cause failure (search for similar items in EconPapers)
Date: 2016
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Citations: View citations in EconPapers (11)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:reensy:v:155:y:2016:i:c:p:147-159

DOI: 10.1016/j.ress.2016.07.008

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