SF6 GAS MONITORING AND SAFETY FOR DC ELECTRON BEAM ACCELERATOR AT EBC, KHARGHAR, NAVI MUMBAI

A 3 MeV, 30kW DC Industrial electron beam accelerator has been designed, commissioned and tested at Electron beam centre, Kharghar. The accelerator has been tested up to 10 kW power level with SF6 gas at 6 kg/cm 2 . The accelerating column, high voltage multiplier column, electron gun and its power supply are housed in accelerator tank, which is filled with SF6 gas as gaseous insulator at 6 kg/cm^2. The SF6 gas is being used due to high dielectric strength and excellent heat transfer characteristics. The SF6 gas is non toxic and non carcinogenic. The SF6 gas replaces oxygen and OSHA has established the permissible TLV of 1000ppm. The SF6 gas is being green house gas, leak tightness has to monitor in the system and leak if any should be repaired. The gas should be used, recycled and reuse and thus saving the environment. This paper describes the safety and monitoring of the SF6 gas leak, quality and precautions in 3 MeV accelerator.