摘要
针对化学清洗方法对核电机组二回路的适用性问题,对CPR1000核电机组二回路管道进行了化学清洗试验研究。通过静态旋转挂片试验、动态试验台冲洗试验及钝化再防腐试验全面测试了5种清洗试剂,3种钝化剂对于CPR1000机组现场20#碳钢、304不锈钢管材及相应的标准试片的清洗效果及清洗后再防腐能力。通过试验中取得的数据,分析了各酸洗试剂的酸洗减重效果,并结合各种酸洗试剂与钝化剂的组合试验结果,给出了相对较好的化学清洗试剂选择方案;在静态试验的基础上,利用动态中试试验台进行了化学冲洗动态试验,模拟实际的冲洗效果,分析了所得结果与静态试验结果的匹配性,同时在试验结束的试剂排放过程对化学试剂在系统内的残留进行了相关的测量与评价。研究结果表明:化学清洗方法适用于CPR1000核电机组,综合对比清洗及再防腐能力可见,EDTA是一种相对较好的化学清洗试剂。
Aiming at the applicability of the chemical cleaning method to the second loop of the nuclear power plant, the test method was used to study the chemical cleaning of the loop pipeline belongs to the second loop of CPR1000 nuclear power plant. Through static rotary coupon method test, dynamic flushing test, passivation and corrosion prevention test, five cleaning reagent and three passivator were tested with 20# carbon steel, 304 stainless steel pipe and the corresponding standard test piece, and the comprehensive cleaning effect anti-corrosion ability after cleaning was got by above-mentioned test. The test effect of each cleaning reagent was analyzed by the data got from the test, and the better chemical cleaning agent is given relatively by comprehensive contrast to the cleaning and anti-corrosion ability; on the basis of static test, the dynamic test is carried out to simulate the actual flushing effect, and matching performance with the result of static test can also be got. Beyond that, the chemistry residual of the system after cleaning was measured, and the assessment of the chemistry residual was got with it. The results indicate that the chemical cleaning method is suitable for CPR1000 Nuclear power unit, EDTA is a relatively better chemical cleaning agent by comprehensive contrast to the cleaning and anti-corrosion ability.
作者
郭东辉
李继兵
桑钱锋
GUO Dong-hui LI Ji-bing SANG Qian-feng(China Guangdong Nuclear Power Engineer Co.Ltd., Shenzhen 518000, China)
出处
《机电工程》
CAS
2017年第10期1106-1111,共6页
Journal of Mechanical & Electrical Engineering
关键词
核电机组
化学清洗
再防腐
化学残留
nuclear power unit
chemical cleaning
corrosion prevention
chemistry residual
