华龙一号核电机组主泵化学去污工艺研究  

Chemical Decontamination Process for Main Pump of Hualong One PWR

作　　者：张鼎纹 张冀兰 于义军 任科 丁强 史慧梅 杨新辉 王元伟 张雪峰 吴多东 刘锋[2] 冯兴宇 刘朋帅 匡文军 ZHANG Dingwen;ZHANG Jilan;YU Yijun;REN Ke;DING Qiang;SHI Huimei;YANG Xinhui;WANG Yuanwei;ZHANG Xuefeng;WU Duodong;LIU Feng;FENG Xingyu;LIU Pengshuai;KUANG Wenjun(Huaneng Hainan Changjiang Nuclear Power Co.,Ltd.,Changjiang 572733,China;Xi'an Thermal Power Research Institute Co.,Ltd.,Xi'an 710054,China;School of Materials Science and Engineering,South China University of Technology,Guangzhou 510641,China;School of Materials Science and Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]华能海南昌江核电有限公司,昌江572733 [2]西安热工研究院有限公司,西安710054 [3]华南理工大学材料科学与工程学院,广州510641 [4]西安交通大学材料科学与工程学院,西安710049

出　　处：《中国腐蚀与防护学报》2025年第3期739-746,共8页Journal of Chinese Society For Corrosion and Protection

基　　金：华能集团科技项目(HNKJ21-HF329)。

摘　　要：压水堆一回路部件放射性去污是核电站大修期间的重要工序,而部件表面含活化腐蚀产物的有效清除直接关系到检修人员安全。为此,本文针对华龙一号机组压水堆核电站的冷却剂主循环泵材料X3CrNiMo13-4,通过对模拟氧化膜的溶解腐蚀实验,对比分析了溶液组成和工艺参数对氧化物清除效果的影响。同时,结合扫描电子显微镜(SEM),评价了去污工艺对合金基体的损伤,并优化了去污处理工艺。结果表明,用柠檬酸+DTPA溶液清洗与酸性高锰酸钾氧化工艺交替进行可实现对氧化膜的有效清除。与碱性高锰酸钾相比,酸性高锰酸钾溶液对材料腐蚀产物的清除效果更好且不会损伤合金基体。The radioactive decontamination of the primary circuit components of the pressurized water reactors(PWRs)is an important process during the overhaul of the nuclear power plant.The effective removal of activated corrosion products on the surface of structural components is directly related to the safety of maintenance personnel.Herein,the X3CrNiMo13-4 steel,used in the main coolant circulating pump of Hualong One PWR,was oxidized in an autoclave to form a pre-oxide scale,as a simulation of the oxide scale formed on its surface in the PWR.Then the influence of the composition of decontamination solution and the process parameter on the removal effectiveness of the simulated oxide scale was compared and analyzed,meanwhile the possible deterioration effect of the decontamination process on the steel matrix was also evaluated using scanning electron microscopy(SEM).The results show that the simulated oxide scale can be effectively removed through alternative treatments of citric acid+DTPA solution cleaning and acidic potassium permanganate oxidation.Compared with alkaline potassium permanganate,the acid potassium permanganate solution has a better removal effect on the corrosion products of the X3CrNiMo13-4 steel without damaging the alloy steel matrix.

关 键 词：压水堆 一回路 氧化物 去污工艺 

分 类 号：TG174[金属学及工艺—金属表面处理]