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

作者：Zhang, Sai; Tong, Jiejuan; Zhao, Jun^*

来源：Reliability Engineering & System Safety, 2016, 155: 147-159.

DOI：10.1016/j.ress.2016.07.008

• Nuclear power plant
• Multi-unit site
• Probabilistic risk assessment
• High temperature gas cooled reactor
• Intra and inter unit common cause failure

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.

• 出版日期2016-11
• 单位清华大学