核电站定子线棒漏氢监测短板分析及应对建议  

Analysis on Shortcomings of Hydrogen Leakage Monitoring of Stator Coils in Nuclear Power Plants and Countermeasures

作　　者：赵士鹏 刘正春 姚瑜 ZHAO Shipeng;LIU Zhengchun;YAO Yu(China National Nuclear Power Co.,Ltd.,Jiaxing 314300,China)

机构地区：[1]中核核电运行管理有限公司,浙江嘉兴314300

出　　处：《电工技术》2024年第13期202-205,209,共5页Electric Engineering

摘　　要：针对某核电站定子冷却水箱气相空间氢含量高问题进行深入研究,发现氢气渗透无法避免。结合二十五项反措要求和定子冷却水系统特点进行分析,得出定子线棒漏氢监测的手段应对富氧(敞开式)系统和贫氧(密封式)系统区别对待。对于贫氧系统,实际运行过程中发现诸多核电站的定子冷却水箱气相空间存在密封差的共性问题,导致现有定子线棒漏氢监测存在不足。为此研发定子线棒漏氢监测实时分析装置,该装置不仅通过排气流量和氢含量实时计算当前漏氢量,还可以根据不同密封性能的定子冷却水箱进行动态标定,能够有效解决上述问题,具有一定推广意义。This paper conducts an in-depth analysis on the problem of high hydrogen content in gas phase of the stator cooling water tank of an actual nuclear plant,and finds that hydrogen permeation is unavoidable.By combining industry regulations and the characteristics of stator cooling water system,it is concluded that the monitoring of hydrogen leakage in stator cooling water system should be treated differently between oxygen-enriched(open)systems and oxygen-depleted(sealed)systems.During practical operation of the oxygen-depleted system,it has been found that the gas phase of stator water tanks of many nuclear power plants has a common problem of poor sealing,which leads to the shortcomings of the existing hydrogen leakage monitoring of stator coil.To this end,a real-time analysis device for monitoring hydrogen leakage of stator coils is developed.This device is capable of not only calculating the current hydrogen leakage in real time through exhaust flow and hydrogen content,but also performing dynamic calibration according to stator cooling water tanks with different sealing levels.It can effectively solve the aforementioned problem,and has certain popularizing significance.

关 键 词：定子线棒 定冷水箱 漏氢监测 

分 类 号：TM623[电气工程—电力系统及自动化]