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快堆主容器为核安全一级设备,是反应堆一次冷却剂和覆盖气体的承压边界,用于包容装载冷却剂钠和堆内设备并形成反应堆一回路系统,其直径近8m,壁厚25mm,属于大尺寸薄壁容器,分几个大的零部件运至现场并组装焊接而成,加工制造要求高、难度大。主容器在现场安装完成后
The main reactor for the fast reactor is nuclear safety equipment, which is the pressure boundary of the primary coolant and the cover gas of the reactor. It is used to contain the sodium and the reactor coolant, and form the first reactor system with the diameter of nearly 8 m and the wall thickness of 25 mm , Is a large-size thin-walled container, divided into several large parts shipped to the site and assembled welded together, processing and manufacturing demanding, difficult. After the main container is installed in the field