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报道了PWR核电站蒸汽发生器(SG)二次侧腐蚀产物(Fe_3O_4)化学清洗工艺中型试验研究。试验在中型化学清洗试验回路上进行。在实验室研究和小回路试验的基础上,中型规模的试验研究评定了以EDTA(乙二胺四乙酸)为主的化学清洗工艺(温度、流量、时间、清洗方式)、腐蚀产物沉积形式对腐蚀产物清洗的有效性和验证SG二次侧结构材料在化学清洗过程中的安全性。用电化学线性极化法优化化学清洗剂的缓蚀剂组分,并在中型试验回路
The medium-scale experimental study on the chemical cleaning process of secondary corrosion products (Fe 3 O 4) at the steam generator (SG) of PWR nuclear power plant was reported. The test is carried out on a medium-sized chemical cleaning test circuit. Based on laboratory studies and small-circuit tests, the pilot study on medium-sized scale assesses the chemical cleaning process (temperature, flow rate, time, cleaning method) dominated by EDTA (ethylenediaminetetraacetic acid), the deposition pattern of corrosion products The effectiveness of corrosion product cleaning and verify the safety of SG secondary structural materials during chemical cleaning. Electrochemical linear polarization method is used to optimize the corrosion inhibitor component of chemical cleaning agent and the medium-sized test circuit