Reliability analysis of the diverse actuation system(DAS)in nuclear power plants is essential to protect the system against the consequences of a design baseline event in the event of a common cause failure of the nuclear power plant.Aiming at the combined explosion problem of Markov's method,this paper proposes an equivalent modular analysis method.The proposed method can decompose the Markov model of DAS into several parts and quantitatively analyze these relatively low complexity parts.Based on the calculation results,each part is equivalent to a device or module,and finally,all equivalent devices are integrated to form an equivalent system.A Markov model of the equivalent system is constructed to replace the original Markov model for quantitative analysis.Finally,the proposed method was used to quantitatively calculate the DAS system platform of nuclear power plants,and the results were verified by using the dynamic reliability block diagram(DRBD)method.The results demonstrate the effectiveness of the proposed method.
维普
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