某核电厂蒸汽发生器排污净化系统泵出口管道泄漏原因  

Leakage Causes of Pump Outlet Pipes of Steam Generator Sewage Purification System in a Nuclear Power Plant

作　　者：韩辉 许新竹 HAN Hui;XU Xinzhu(Jiangsu Nuclear Power Company,Lianyungang 222042,China)

机构地区：[1]江苏核电有限公司,连云港222042

出　　处：《腐蚀与防护》2024年第6期119-125,共7页Corrosion & Protection

摘　　要：国内某机组运行15 a后,蒸汽发生器排污净化系统泵出口管道发生泄漏。采用超声波测厚、化学成分分析、金相检验、扫描电镜观察、能谱分析及流场模拟计算等方法,分析了管道泄漏的原因。结果表明:低温流动加速腐蚀(FAC)导致管壁减薄,最终导致管道泄漏,管件材质、几何形状,介质pH、温度、溶解氧含量及流速等是发生FAC的重要因素。After 15 years of operation of a domestic nuclear power plant,the outlet of the pump of the steam generator sewage purification system leaked.The reasons for the leaking of pipe were analyzed by composition analysis,metallographic inspection,scanning electron microscope observation,energy spectrum analysis and flow field simulation calculation.The results show that the thinning of the pipe wall was caused by flow accelerated corrosion(FAC)with low temperature,eventually leading to the leakage.The pipe material,geometry,pH value of the medium,temperature,dissolved oxygen content and flow rate were important factors for the FAC.

关 键 词：管道 泄漏 流动加速腐蚀(FAC) 温度 介质 

分 类 号：TG174.4[金属学及工艺—金属表面处理]