核电站高压安全注入系练的故障模式分析

高压安全注入系统是核电站专设安全设施的一个组成部分。正常运行时,它是个备用设备,发生失水事故时,可向堆芯注入应急冷却水,以确保核电站安全。本文将故障树分析法和状态枚举法相结合,成功地分析了“伪冗余”系统的故障模式,并利用重复模块分析法、早期不交化和蒙特卡罗法算出高压安全注入系统的无效度及置信区间、各部件的概率重要度和结构重要度。

An Analysis of Failure Modes of High Pressure Safety Injection System for Nuclear Power Plant

The high pressure safety injection system is a component of the engineered safety features of the nuclear power plant. During normal operation, it is a stand-by facility. When a loss-of-coolant accident occurs, it injects emergency cooling water into the core to ensure the safety of the nuclear power plant. In this paper, failure modes of "pseudoredundancy system" are analysed by combining the fault tree analysis with the exhausttion method. Calculations are also made of the unavailability and confidence bounds of the high pressure safety injection system as well as the probability importance and structural importance of its components with the methods of modular decomposition principle, early disjointform and the Monte Carlo method.