核电厂二回路小管道减薄原因分析及对策  

Analysis and Countermeasures for Thinning of Small Pipe in Secondary Loop of Nuclear Power Plant

作　　者：秦金光 朱浩 王旭 姜洪宇 QIN Jinguang;ZHU Hao;WANG Xu;JIANG Hongyu(CNNC Operation Maintenance Technology Co.,Ltd.,Hangzhou 311215,China;Jiangsu Nuclear Power Co.,Ltd.,Lianyungang 222042,China)

机构地区：[1]中核运维技术有限公司,浙江杭州311215 [2]江苏核电有限公司,江苏连云港222042

出　　处：《电工技术》2024年第13期214-217,共4页Electric Engineering

摘　　要：某核电厂在运行期间,常规岛二回路小管道泄漏问题时有发生,常需采取带压堵漏的形式进行处理,给运行人员安全及机组安全稳定运行带来隐患。为查找二回路小管道泄漏的根本原因,并采取相应纠正措施消除二回路小管道泄漏问题,针对大修中因泄漏更换下来的LCS、LBQ、LBA系统管道弯头进行化学成分分析、显微观察、硬度测量、晶相分析,结合现场运行工况等进行失效原因分析,并提出改进意见。An actual nuclear power plant encountered often leakage of secondary loop small pipelines in conventional island which needed treatment by pressure plugging and brought hidden dangers to safety and stable operation.This paper reports the aforementioned problem and the effort made to cope with it,including examination seeking the root cause of secondary loop small pipe leakage through chemical composition analysis,microscopic observation,hardness measurement,and crystal phase analysis for the demolished pipe elbow of LCS,LBQ and LBA systems(replaced during overhaul),and the formulation and execution of recommended countermeasures.

关 键 词：金属监督 小管道 壁厚减薄 

分 类 号：TM623[电气工程—电力系统及自动化]