锈蚀样件在动态钠回路中的实验研究

Experimental research of rust removed by flowing sodium

中国实验快堆的蒸汽发生器在安装过程中发现其中一个蒸发器和一个过热器壳程内存在较为严重的锈蚀现象。为此中国原子能研究院快堆工程部钠工艺研究室进行了钠中静态浸泡实验,但是静态除锈温度要求较高,快堆现场在运行前不易达到该要求。为了进一步研究蒸汽发生器锈蚀表面在动态钠中的行为,为现场进行蒸汽发生器的清洗提供依据,快堆工程部决定进行蒸汽发生器锈蚀样件动态清洗实验。本实验利用"PEC堆电磁泵特性实验钠回路",模拟蒸汽发生器的运行工况,前后对比样件的照片,得出不同条件下的清洗效果,为中国实验快堆蒸汽发生器现场在线清洗提供依据。

It was found that there were badly oxidation phenomena in a superheater and a evaporator of CEFR＇ s steam generators when they were being installed.So a static immersion test had been finished firstly by the sodium technology department of CEFR to investigate how to removing the rust from the CEFR＇ s steam generators.But the site condition of CEFR＇ s steam generators can not achieve the condition of the means of removing rust only by static immersion.We decided to do the test of removing rust by flowing sodium of the samples of CEFR＇ s steam generators to investigate behavior of the oxidation surface of CEFR＇ s steam generators in the flowing sodium.The test would provide the testing foundation for the work of removing rust by flowing sodium on CEFR site.The test has utilized a mini-loop of sodium—＂sodium loop for characteristic test of PEC＇ s electromagnetism pump ＂ and simulated the work condition of CEFR＇ s steam generators.Through the comparison between the photos of the samples which are before and after the test,the results about effect of removing rust of the samples under different conditions have been reached.These would provide the testing foundation for the work of removing rust by flowing sodium of CEFR＇s steam generators.