Dry Decontamination for Tritiated Wastes

To aim at decontamination of tritiated wastes,we have developed and fabricated a dry tritium decontamination system,which is designed to reduce tritium surface contamination of various alloy by UV,ozone and heating.The result indicates that the elevation of temperature can obviously improve decontamination effect.With 3 h irradiation by 365 nm UV at 220 ℃,it has a decontamination rate of 99% to stainless steel surface.Ozone can more obviously improve decontamination effect when metal was heated.Ozone has a decontamination effect beyond 95% to stainless steel,aluminum and brass at 220 ℃.Tritium surface concentration of metal has a little increase after decontamination.