考虑性能退化和多级保障的核动力系统可用度分析

摘要

The availability analysis which combines universal generating function (UGF) with Markov state transition theory was proposed to nuclear power system with performance degradation and multi-level support capacity .The system logical model and performance state combination model were constructed by UGF . Furthermore , the computational expression for component state probability based on Markov method was constructed considering performance degradation and multi-level support capacity .And then the model was embedded into the logic model and performance state combination model by UGF . This combined model was used in availability analysis of an actual example with different performance demands , and the influence of maintenance condition to system availability was also analyzed .The results show that this method captures the operational and maintenance characteristics . T he obtained results can provide guidance to nuclear power system operation , management , maintenance decision-making and support condition analysis .%研究了将通用发生函数理论与M arkov过程方法相结合的方法对考虑性能退化和多级保障的核动力系统进行可用度分析。基于 M arkov过程方法建立考虑性能退化和多级保障的设备状态概率模型，并将其嵌入由发生函数构建的系统逻辑关系模型和性能状态组合模型，从而分析系统在不同性能需求条件下的可用度，并分析不同修理条件对系统可用度的影响。所建立的模型反映了核动力系统的使用特点和维修保障特性，研究方法和分析结论能为核动力系统的使用管理、维修决策及保障条件分析提供理论指导和依据。