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王苗苗，岳娟，池乐忠，等.非能动余热排出热交换器的关键焊接技术［J］.电焊机，2023，53（10）：71-77.
WANG Miaomiao, YUE Juan, CHI Lezhong, et al.Welding for Passive Residual Heat Removal Heat Exchanger[J].Electric Welding Machine, 2023, 53(10): 71-77.
余热排出热交换器（PRHX/PRS）是第三代核岛设备中的关键设备，其可靠性、稳定性对整个核电厂运行的安全性及经济性都非常重要。在AP1000、CAP1400以及ACP1000堆型中，非能动余排都占据了非常重要的地位。介绍了PRHX/PRS的设计参数及结构、主体材料及主要焊接内容、关键焊接技术。重点介绍了管板堆焊工艺、封头焊接工艺、管子管板封口焊技术、不锈钢框架及抗震组件工艺。管子管板封口焊技术采用不填丝自动钨极氩弧焊工艺，其难点在于管子壁厚较薄，焊接过程中控制不当，会使焊缝根部出现不连续缺陷。不锈钢框架及抗震组件焊接技术是一种重要的工程技术，在进行不锈钢框架及抗震组件焊接时，需要遵循一定的工艺流程和操作规范，以确保焊接质量和安全性。
Residual heat removal heat exchanger (PRHX/PRS) is the key equipment in the third generation nuclear island equipment, whose reliability and stability are very important to the safety and economy of the whole nuclear power plant operation. In AP1000, CAP1400 and ACP1000, passive residual row plays a very important role. The design parameters, structure, main materials, main welding contents and key welding techniques of PRHX/PRS are introduced. The technology of tube sheet cladding, welding of head, sealing of tube plate, stainless steel frame and seismic component are introduced. The sealing welding technology of tube and tube plate is a kind of welding process, which adopts the automatic tungsten-argon arc welding process without wire filling. The difficulty of the sealing welding of tube and tube plate is that the thickness of the tube is thin, and improper control in the welding process will cause discontinuous defects at the root of the weld. The welding technology of stainless steel frame and seismic component is an important engineering technology, which has been widely used in many fields. When welding stainless steel frames and seismic components, it is necessary to follow certain technological processes and operating specifications to ensure welding quality and safety.
核电非能动余热排出热交换器管板堆焊封头焊接封口焊接
powerPRHX/PRSsealing head weldingtube plate sealing weldingsealing welding
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