管座焊缝的失效原因及改进措施  

Failure Reasons and Improvement Measures of Pipe Seat Welding seam

作　　者：李守彬 LI Shou-bin(Daya Bay Nuclear Power Operations and Management Co.,Ltd.,Shenzhen 518000,Guangdong,China;Harbin Institute of Technology,Weihai,Weihai 264200,Shandong,China)

机构地区：[1]大亚湾核电运营管理有限责任公司,广东深圳518000 [2]哈尔滨工业大学威海分校,山东威海264200

出　　处：《电站辅机》2019年第1期36-39,共4页Power Station Auxiliary Equipment

摘　　要：在核电机组中有众多的连接管路,而核级母管与支管座之间的焊缝是重要的连接焊缝。在大亚湾核电基地,已开展了多次焊接质量方面的反馈检查,约有近10次大修级别的排查活动。通过排查,改进并固化了排查分类,优化了质检策略。同时,还对管座的结构进行了创新设计。经验证,提高了核电机组主回路管道系统运行的安全性。There are many connecting pipelines in nuclear power units,and the welding seam between the nuclear grade master pipe and the support pipe seat is an important connecting seam.At Daya Bay Nuclear Power Station,feedback checks on welding quality have been carried out many times,and about 10 checks on overhaul level have been carried out.Through investigation,the classification of investigation was improved and solidified,and the quality inspection strategy was optimized.At the same time,innovative design of the structure of the pipe seat is also carried out.It has been proved that the safety of the main circuit pipeline system of nuclear power unit has been improved.

关 键 词：核电站 管座 焊缝 失效 反馈 质检 改进措施 检修 

分 类 号：TK226[动力工程及工程热物理—动力机械及工程]