某核电机组堆芯测量系统(RIC)手动阀和密封组件被误用四氯乙烯进行清洗。而该部件为奥氏体不锈钢,由于四氯乙烯热解过程中会导致氯离子Clˉ的产生,存在Clˉ致应力腐蚀风险。通过分析手动阀和密封组件的残留Clˉ含量、运行温度以及冷却剂中的氧含量,认为残留的Clˉ含量不会导致手动阀和密封组件在服役过程中发生应力腐蚀。 A Nuclear Power Station Core Measurement System (RIC) manual valve and seal assembly was mistakenly cleaned with tetrachlorethylene. The part is austenitic stainless steel, due to PCE pyrolysis process will lead to the generation of chloride ions Clˉ, there is the risk of chloride stress corrosion. By analyzing the residual Clˉ content of the manual valve and seal assembly, operating temperature and oxygen content in the coolant, it is considered that residual Clˉ content will not cause stress corrosion of the hand valve and seal assembly during service.