核电厂数字化仪控系统I/O卡件备件数量优化  

Optimization of the Quantity of I/O Card Spare Parts of the Digital I&C System in Nuclear Power Plant

作　　者：张磊 夏林路 周世梁[1] 陈浠毓 ZHANG Lei;XIA Linlu;ZHOU Shiliang;CHEN Xiyu(School of Nuclear Science and Engineering,North China Electric Power University,Beijing,102206,China;China Nuclear Power Engineering Co.LTD,Beijing,100840,China)

机构地区：[1]华北电力大学核科学与工程学院,北京102206 [2]中国核电工程有限公司,北京100840

出　　处：《核科学与工程》2021年第6期1189-1194,共6页Nuclear Science and Engineering

基　　金：装备预研重点实验室基金项目资助(6142A07200311)。

摘　　要：数字化仪控系统(DCS)是核电厂的神经中枢,是一种以微处理器为基础,采用控制功能分散显示、操作集中、兼顾分而自治和综合协调的设计原则的仪表控制系统,它对机组的安全、经济运行起着至关重要的作用。I/O卡件是DCS与现场仪表交互的关键部件,当I/O卡件出现故障时,需要及时更换,所以I/O卡件需要一定数量的备件。如果备件过少,系统可用率达不到要求,反之会导致总费用过高。基于马尔可夫模型,提出了一种可用率约束条件下,考虑共因失效的I/O卡件备件数量优化方法。并采用概率检测器PRSIM实现了对马尔可夫模型的定量分析,得出了满足可用率的约束条件的最少备件数,达到降低核电厂DCS运行维护费用的同时,保证其安全可靠运行的优化效果。The digital I&C system(DCS)is the nerve center of nuclear power plant,which plays a vital role in the safe and economical operation of the unit.The I/O cards are key components for the DCS to interact with field instruments.When the I/O cards fail,they need to be replaced in time to ensure the safe operation of nuclear power plant.Therefore,a certain number of spare parts are required for the I/O cards.If the spare parts are rather few,the system availability cannot meet the requirements,otherwise the total cost will be too high.Based on the Markov model,an optimization method for the number of the I/O card spare parts under the condition of availability constraint and considering common cause failure is proposed.The probability detector PRSIM is used to analyze the Markov model quantitatively,and the minimum number of spare parts satisfying the availability constraints is obtained.

关 键 词：I/O卡件 马尔可夫模型 共因失效 备件数量 PRISM 

分 类 号：TL48[核科学技术—核技术及应用]