核电蒸汽发生器管子管板焊缝根部不连续缺陷分析  

Analysis of Root Discontinuities at Tube to Tubesheet Seal of Nuclear Power Steam Generator

作　　者：吴琼 杨俊 张茂龙 WU Qiong;YANG Jun;ZHANG Mao-long(Shanghai Electric Nuclear Power Equipment Co. ,Ltd. ,Shanghai 201306,China;Shanghai Engineering Research Center of Nuclear Power Equipment Welding and Examination,Shanghai 201306,China)

机构地区：[1]上海电气核电设备有限公司,上海201306 [2]上海核电装备焊接及检测工程技术研究中心,上海201306

出　　处：《压力容器》2018年第11期73-77,共5页Pressure Vessel Technology

基　　金：上海市科委资助项目(14DZ2250300)

摘　　要：管子管板焊接是制造核岛主设备蒸汽发生器关键工序,管子管板焊缝根部不连续是管子管板焊接质量考核的重要指标。介绍了蒸汽发生器管子管板焊缝的结构,比较了RCC-M标准与ASME规范对管子管板焊缝根部不连续考核要求的不同,对管子管板焊缝进行了金相检测,分析焊缝根部不连续产生的原因,评估了焊缝根部不连续对管子管板焊缝质量的影响。Tube-to-tubesheet welding is the key procedure in the manufacturing of nuclear power steam generator.Root discontinuities at tube-to-tubesheet seal is a key indicator for quality evaluation.In this paper,the structure of tube-to-tubesheet seal of the steam generator was described.The differences in the requirements of RCC-M and ASME for root discontinuities at tube-to-tubesheet seal were compared.Metallographic examination for tube-to-tubesheet seal was performed to analyze the cause for root discontinuities,and influence of root discontinuities on tube-to-tubesheet seal quality was assessed.

关 键 词：蒸汽发生器 管子管板焊接 焊缝根部不连续 最小泄漏通径 

分 类 号：TH49[机械工程—机械制造及自动化] TG441.7[金属学及工艺—焊接]