摘要
蒸汽发生器水位控制直接影响反应堆保护,通过4取2逻辑产生蒸发器水位低低反应堆停堆信号,蒸发器水位低与上蒸汽/给水流量失配信号产生反应堆停堆信号。文章通过介绍蒸发器水位控制原理及其信号流程,并结合福清核电1-4号机组DCS网络结构,分析了在DCS网络故障下,蒸发器水位控制失效的两种模式,分别提出优化方法以保障蒸发器水位控制的稳定性和完整性。针对优化方法的可行性,得出需对蒸汽流量信号和给水温度信号进行传输优化,并增加后备盘质量位判断逻辑的结论,以提高核电厂安全稳定。
Steam generator water level control directly affects reactor protection.A low-low steam generator water level results in a reactor trip signal by 4 to 2 logic.The low steam generator water level and steam/feed water flow mismatch produces a reactor trip signal.This paper introduces the principle of steam generator water level control and its signal flow,and combines the DCS network structure of Fuqing Nuclear Power Plant No.1-4 to analyze the two modes of steam generator water level control failure under DCS network failure,and propose optimization methods to ensure steam generator water level control stability and integrity.According to the feasibility of the optimization method,it is concluded that the steam flow signal and the feed water temperature signal need to be optimized,and the conclusion of the Back-Up quality signal logic is added to improve the safety and stability of the nuclear power plant.
作者
章驰
ZHANG Chi(Second Maintenance Department,Fujian Fuqing Nuclear Power Co.Ltd. ,Fuqing,Fujian 350300,China)
出处
《南华大学学报（自然科学版）》
2020年第2期25-33,共9页
Journal of University of South China：Science and Technology
关键词
水位控制
失效模式
网络故障
质量位
water level control
failure mode
network failure
quality signa
