Multi-State Reliability for Pump Group in Nuclear Power System Based on UGF and Semi-Markov Process
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摘要: 将通用发生函数(UGF)与半马尔可夫过程(Semi-Markov Process)相结合,对反应堆泵机组进行多状态可靠性分析。给出多状态系统可靠性分析的UGF算法模型,推导多状态设备性能状态的Semi-Markov过程概率表达式,定义设备、系统性能值的定量描述方法。以性能参数是否满足需求值做为系统成功与失效的判据,对比分析反应堆泵机组在需求性能条件下的多状态可用度与2状态可用度结果,并给出系统在任务周期内的平均性能值。结果表明,该方法能够定量分析部分失效对系统可靠性的影响,降低传统的2态可靠性分析方法产生的不必要的保守程度。
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关键词:
- UGF /
- Semi-Markov Process /
- 设备性能 /
- 多状态系统 /
- 可靠性
Abstract: In this paper,multi-state reliability value of pump group in nuclear power system is obtained by the combination method of the universal generating function（UGF） and Semi-Markov process.UGF arithmetic model of multi-state system reliability is studied,and the performance state probability expression of multi-state component is derived using semi-Markov theory.A quantificational model is defined to express the performance rate of the system and component.Different availability results by multi-state and binary state analysis method are compared under the condition whether the performance rate can satisfy the de-manded value,and the mean value of system instantaneous output performance is also obtained.It shows that this combination method is an effective and feasible one which can quantify the effect of the partial failure on the system reliability,and the result of multi-state system reliability by this method deduces the modesty of the reliability value obtained by binary reliability analysis method. -
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