为保证核电站的安全运行, 降低核级换热器传热管的环境敏感开裂风险, 核级传热管的采购标准《压水堆核岛机械设备设计和建造规则》(RCC-M)中规定了残余应力的检验要求。重点介绍了残余应力检验采用的C型环试验和沸腾氯化镁试验方法及需要注意的问题。其中C型环试验可以定量检验出残余应力值; 沸腾氯化镁试验可用于证明传热管的表面残余应力是否小于某个要求值。这两种方法便于实施, 可满足工业化的核电用不锈钢传热管采购的检验需要。

To keep the operation safety of nuclear power station and reduce the risk of environment sensitive cracking of nuclear class heat-exchange tubes, RCC-M specified the requirement of residual stress test. It was mainly introduced including the C-ring and boiling magnesium chloride residual stress test and the problems that needed attention. C-ring test can give the residual stress quantitative, and boiling magnesium chloride test can prove whether the residual stress less than a given required value. These two methods are easy to implement, which can satisfy the test requirement of nuclear class heat exchange tubes in industrialization production.