研究堆低压电气贯穿件的密封性能

Leak Tightness of Low Voltage Electrical Penetration Assembly on Research Reactor

摘要: 电气贯穿件的密封性能直接关系着整个反应堆的安全性能。为了使电缆贯通式的电气贯穿件能满足研究堆设计文件的密封性能要求，首先分析了贯穿件筒体和电缆密封的难点，针对遇到的难点，分别采取了法兰挤压硅橡胶板和电缆芯线灌胶密封的方法，对贯穿件的缝隙进行密封。利用氦质谱仪器，对低压电气贯穿件样机和电缆进行了密封检测实验，实验结果表明，电缆贯通式的低压电气贯穿件密封结构能满足研究堆的密封要求。

Abstract: The leak tightness of electrical penetration assembly is close connection with the safety of reactor. The cables that are through the electrical penetration assembly are not cut off, so it is difficult to seal the radioactive matter for electrical penetration assemblies and the cables. The methods that the rubber can be metamorphosed with the pressure of flange and that the gap of cables can be filled with especial glue were used to seal the radioactive matter. A serial of tests were done to check the leak tightness of electrical penetration assemblies. The test result shows that the sealed structure of electrical penetration assembly can keep integral of the boundary of reactor.