船用核动力一回路系统使用可用度仿真

Operational Availability Simulation for Primary Loop of Marine Nuclear Power Plants

船用核动力一回路系统的可用性是长期以来备受关注的重要问题,由于一回路系统有复杂可修的特点,其可靠性框图并联分支中有两个以上单元串联这种局部结构尤为常见,以往用正常、维修、待用3种使用状态不足以描述其实际的使用情况,充分考虑系统各单元的6种使用状态,基于最小路集判断各单元的状态转移,采用蒙特卡罗数值仿真方法,克服常规解析方法求解困难的弊端,求得了系统的多项可用性指标;仿真方法对复杂可修系统具有通用性,仿真结果可以为装备的运行与使用管理提供参考。

The availability of marine nuclear power plants（ MNPP） primary loop system is a persistently concerned problem. It can’t describe the actual situation of using with the usual solution consisting three using situations： normal,maintaining and standby because the primary loop system is complex maintainable and it is a common local structure that more than one series structures are mixed in the parallel branch.Considering 6 working conditions,based on the thought judgment system of minimal path sets,the MonteCarlo numerical simulation method was combined to overcome the disadvantages of conventional analytical method. Taking the primary circuit system of nuclear power plant for example,the various availability indexes were obtained. The simulation method is widely applicable and the simulation results can be used to provide the reference for equipment operation and management.