Leak Tightness of Low Voltage Electrical Penetration Assembly on Research Reactor

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.