田湾核电站数字化反应堆保护系统可靠性分析

Reliability Analysis of Digital Reactor Protection System of Tianwan Nuclear Power Plant

分析了田湾核电站数字化反应堆保护系统的结构和基本功能,以故障树分析方法为基础,确定了数字化反应堆保护系统故障树的顶事件,建立了以反应堆停堆子系统失效为顶事件的故障树,利用RISK-SPECTRUM程序,对所建的故障树进行了定量分析和计算,得到了系统故障树的失效概率和最小割集,为田湾核电站运行和维修提供了有益的指导。

In the paper the function and structure of digital reactor protection system of Tianwan NPP was analyzed and the top events of fault trees of digital reactor protection system were established based on the reliability analysis methods of FTA （Fault Tree Analysis）. The unavailability and the Minimal Cut-Sets （MCS） of the fault trees were obtained by the analysis and calculation using RISK-SPECTRUM software. The result of the analysis contributes to the operation and maintenance of Tianwan NPP.