Fault Tree Reliability Analysis for Passive Medium Pressure Safety Injection System in Nuclear Power Plant
- 1 School of Energy and Environment, Southeast University, Nanjing, China
- 2 School of Energy and Environment, Southeast University, Nanjing, China
Abstract
Modern nuclear power plants, both newly designed generation 3 and existing generation 2 reactors, make use of passive safety systems for significant and measurable improvements in safety and reliability. Medium Pressure Safety Injection System (MP-SIS) in Tianwan Nuclear Power Plant is a typical and very important nuclear safety passive system. This paper discusses the reliability of MP-SIS on the basis of Fault Tree Analysis (FTA) with unavailability and Minimal Cut Set (MCS) calculated as two important indicators. The result illustrates that the passive MP-Safety Injection Tank barely contributes to the system’s unavailability and human interactions with Manual Valves and Motor Operated Valves have great negative impact on the reliability.
- E. Zio and N. Pedroni, “Monte Carlo Simulation-based Sensitivity Analysis of the Model of a Thermal-hydraulic Passive System,” Reliability Engineering and System Safety, Vol. 107, 2012, pp. 90-106. doi:10.1016/j.ress.2011.08.006
- A. K. Nayak, M. R. Gartia, A. Antony, G. Vinod and R. K. Sinha, “Passive System Reliability Analysis Using the APSRA Methodology,” Nuclear Engineering and Design, Vol. 238, No. 6, 2008, pp. 1430-1440. doi:10.1016/j.nucengdes.2007.11.005
- USURC, “NU-REG-75/014. WASH-1400”, 1975.
- NNSA, “Probabilistic Safety Assessment Report Probabilistic Safety Assessment (PSA) Qinshan CANDU Project，12. 98-03600-PSA-001,” 2003.
- G. Y. Jiang, “WWER-1000 Nuclear Power Plant Equipment and System,” 1st Edition, Atomic Energy Press, 2009.
- A. B. Relcon, “Risk Spectrum Theory Manual,” 1998.