摘要
核电站主管道是核反应堆冷却剂系统的主动脉,其焊接一直以来都是核电站安装工作的重中之重。AP1000堆型取消了主管道过渡段,相对之前的压水堆堆型,对焊接变形控制有更高的要求。同时新的管道设计对焊接作业的实施,也是新的课题。文中重点从AP1000核电站主管道母材、坡口形式、焊接材料选择、施工工序、窄间隙自动焊、焊接变形控制和焊接收缩量等方面对主管道窄间隙自动焊技术进行了介绍。最后,通过对实际变形数据进行分析,证实了此种焊接工艺和施工步骤的合理性。
The welding of the RCL(rector coolant loop) pipes has been the most important step in installation of the nuclear power plant.Compared with the previous PWR RCL pipes,the design of API000 RCL pipes deletes the transition section,which results in more difficulties in controlling the welding shrinkage deformation of API000 RCL pipes.At the same time,new design also makes the welding construction be a new job.The automatic narrow gap welding technology was introduced from the aspects of the AP1000 RCL base metal,bevel type,choose of welding material,construction sequence,welding process,welding deformation control and welding shrinkage.At last,the rationality of this welding process and construction sequence was proved by analyzing the deformation data.The studies in this paper can offer the guide and reference for welding of RCL pipe in other AP1000 projects in the future.
出处
《焊接》
北大核心
2013年第9期62-65,72,共4页
Welding & Joining
