LBA失电故障对CCMS系统堆芯水位计算影响分析  

Analysis of the impact of LBA loss of power failure on CCMS system core water level calculation

作　　者：姬海波 JI Haibo(Guangxi Fangchenggang Nuclear Power Co.,Ltd.,Fangchenggang 538001,China)

机构地区：[1]广西防城港核电有限公司,广西防城港538001

出　　处：《中国高新科技》2024年第19期69-71,共3页

摘　　要：CCMS系统(Core Cooling and Monitoring System)是CPPR1000核电站重要的监测系统之一,当发生LBA失电故障时,其计算结果可能与实际情形产生误差。文章基于理论分析及仿真验证方法,对LBA失电故障后,CCMS的计算结果进行了分析研究。分析结果指出当发生LBA失电叠加LOCA事故时,CCMS计算出的堆芯水位低于实际水位,甚至低于THL阈值,导致操纵员判断失误,错误执行SOP规程。需要采取有效的防范措施及培训,防止出现错误判断堆芯水位或错误执行SOP规程。The CCMS system(Core Cooling and Monitoring System)is one of the important monitoring systems in the CPPR1000 nuclear power plant,and in the event of an LBA loss of power failure,its calculations may be inaccurate in relation to the actual situation.This paper based on theoretical analysis and simulation verification methods,the calculation results of CCMS after LBA loss of power fault are analysed and studied.The results of the analysis indicated that when the LBA loss of power was superimposed on the LOCA accident,the water level in the core calculated by the CCMS was lower than the actual water level,or even lower than the THL threshold,which led to the operator’s error of judgement and incorrect execution of the SOPs.Effective precautions and training are needed to prevent incorrect judgement of core water levels or incorrect implementation of SOPs.

关 键 词：CPR1000 CCMS系统 LBA失电 SOP规程 

分 类 号：TH122[机械工程—机械设计及理论]