核电站仪控系统可靠性和可用性分析计算  

Analysis and Calculation of Reliability and Availability for Instrument and Control Systems in Nuclear Power Plant

作　　者：任莉华[1] 郎爱国[1] 李世欣[1] 吴彩霞[1] 

机构地区：[1]环境保护部核与辐射安全中心,北京100082

出　　处：《自动化仪表》2015年第11期127-132,共6页Process Automation Instrumentation

摘　　要：介绍了典型的核电站数字化仪控系统的系统结构和系统设计中所采用的各种高可靠性技术,并采用系统可靠性框图的方法对系统的可靠性和可用性进行了分析和计算。该方法将仪控系统划分为现场控制层、系统服务层、监测控制层等子系统,通过对系统自顶向下逐层分解得到系统的可靠性框图,然后计算出整个系统的可靠性参数。计算结果表明,通过采用适当的可靠性设计措施,系统能够满足高可靠性和可用性要求。The typical systematic architecture of I&C systems in nuclear power plant and various high reliability technologies used in system design are introduced. The reliability and availability of the system are analyzed and calculated by adopting the reliability block diagram of the system. With this method, the I&C systems are divided in subsystems of field control layer, system service layer, and monitoring control layer, etc.;through hierarchical decomposition of the system from top to bottom, the reliability block diagram of the system is obtained; then the reliability parameters of overall system can be calculated. The results of calculation indicate that by using appropriate reliability design measures, the requirements of reliability and availability of the system can be satisfied.

关 键 词：核电站 仪控系统 传感器 现场控制层 PLC 可靠性 冗余 平均故障间隔 

分 类 号：TH-3[机械工程] TP23[自动化与计算机技术—检测技术与自动化装置]