Analysis of Common Cause Failure for Redundancy Pump Group in Nuclear Reactor

The paper applies the interrelated method of common cause failure to work out the parameters of common cause model with Bayesian estimate based on the classification and impact vector assessment of events involving component, and considering special function of check valve, and applies GO Methodology to work out the fault probabilities in start-up and operation process of the system. Its result shows that the common cause failure is very important in the reliability analysis for the redundancy system.