山东海阳核电站CB20模块(核岛安全壳冷却水箱)是一个多部件的组合体,由17种类型共112个子模块焊接拼装而成,其子模块主要由A240S32101双相不锈钢板、A36碳钢型钢及A108剪力钉构成。CB20模块是非能动安全壳冷却系统的重要组成部分,非能动安全壳冷却水储存水箱不锈钢钢板衬里是核电站安全壳屏蔽厂房顶部喷淋系统的水箱钢结构模块。该模块施工位置处于核岛安全壳区域内,施工模块外形尺寸大,结构复杂,且需露天组装。项目研究成果主要创新点为:采用CB20整体拼装运输平台、钢板焊缝背面设计独特的锲形工装、采用控制双相不锈钢的焊接变形与三维定位安装技术,保证了设备安 Shandong Haiyang Nuclear Power Station CB20 module (nuclear island containment cooling tank) is a multi-component assembly composed of 17 types of 112 sub-modules assembled by welding, the sub-module consists of A240S32101 duplex stainless steel, A36 carbon steel section And A108 shear nail structure. The CB20 module is an important part of the passive containment cooling system. The passive containment cooling water storage tank stainless steel plate lining is the tank steel structure module of the top containment system of the containment of the nuclear power plant containment. The construction location of the module is in the nuclear island containment area. The construction module has large size and complex structure, and needs to be assembled in the open air. The main innovations of the project are as follows: the CB20 is used to assemble the transportation platform, the unique wedge-shaped tooling on the back of the steel plate weld is adopted, the welding deformation and the three-dimensional positioning and installation technology for controlling the duplex stainless steel are adopted,