Fault Tree Reliability Analysis for Passive Medium Pressure Safety Injection System in Nuclear Power Plant


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.

Share and Cite:

L. Leng and Y. Liu, "Fault Tree Reliability Analysis for Passive Medium Pressure Safety Injection System in Nuclear Power Plant," Energy and Power Engineering, Vol. 5 No. 4B, 2013, pp. 264-268. doi: 10.4236/epe.2013.54B051.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] 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
[2] 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
[3] USURC, “NU-REG-75/014. WASH-1400”, 1975.
[4] NNSA, “Probabilistic Safety Assessment Report Probabilistic Safety Assessment (PSA) Qinshan CANDU Project,12. 98-03600-PSA-001,” 2003.
[5] G. Y. Jiang, “WWER-1000 Nuclear Power Plant Equipment and System,” 1st Edition, Atomic Energy Press, 2009.
[6] A. B. Relcon, “Risk Spectrum Theory Manual,” 1998.

Copyright © 2021 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.