基于寿命评估与经济性分析确定核电厂触点开关的预防性维修周期

Preventative Maintenance Cycle of Contact Switches for Nuclear Power Plants Based on Lifetime Assessment and Economic Analysis

将寿命预计、成本最优与经济性分析相结合,提出了系统、综合的预防性维修周期确定方法。应用双参数威布尔分布模型确定某型号触点开关的平均寿命;以成本最小为目标,建立了全部定时更换模型以及工龄定时更换模型,得到了该型号触点开关的预防性更换周期,根据预防性更换周期的结果,确定了8种备选方案;应用经济性分析模型,按照该模型对文中提出的8种方案进行了经济性分析,得出了成本最优以及经济性最优的备选方案。

An approach to determine the preventive maintenance cycle was proposed in consideration of the lifetime,optimal cost and economy.Two parameters Weibull distribution was used to calculate the lifetime of contact switch.The block replacement model and age replacement model were built with the objective of optimal cost,and the preventive replacement cycle was accounted.Eight proposals for preventive replacement cycle were given.Economy model was applied to assess those proposals and the optimal proposal was confirmed.