反应堆高阶冗余系统的相关-动态可靠性分析

Dependent-Dynamic Reliability Analysis of High-Order Redundancy System in Nuclear Reactors

冗余泵组是反应堆系统中常见的子系统。高阶冗余泵组由于温备用、共因失效等相关性的相互重叠以及止回阀组同时工作的特殊作用,导致其状态繁多且运行过程复杂。本文应用动态可靠性框图(DRBD),建立DRBD模型,清晰地表示出部件之间的相关性或相关行为以及相关性参数,采用蒙特卡洛(Monte Carlo)方法模拟仿真冗余系统的运行过程,绘制故障概率变化曲线。结果表明,DRBD和Monte Carlo相结合是分析高阶冗余系统相关-动态可靠性的一种有效方法。

The redundancy pump group is a common subsystem in nuclear reactor systems,because of its overlap of warm standby,common cause failure（CCF） and other dependencies,and special effect of check valve group working simultaneously,the high-order one has various states and complex operation.The paper applies the dynamic reliability block diagram（DRBD） to build DRBD model of redundancy pump group,clearly expresses dependencies or dependent behaviors,and dependency parameters between components,and applies Monte Carlo simulation to simulate its operation and plots its fault probability change graphs.The result shows that the combining of DRBD and MC simulation is an effective method to analyze the depend-ent-dynamic reliability of high-order redundancy systems.