An Advanced Head-end Process for Reprocessing of Spent Fuel by High Temperature Vol-oxidation Treatment

High temperature vol-oxidation treatment technology is a dry head-end process used for decladding, oxidation of spent fuel, and the removal of ³H, ⁸⁵Kr/Xe, ¹⁴C, ¹²⁹I and Cs from fuel prior to main spent fuel treatment process which would remove most of the volatile nuclides before fuel dissolution and cause rapid fuel dissolution in HNO₃. If effective, this process would be an effective way for sharp reduction in the volume of liquid radioactive waste and localization fission nuclides (such as tritium and iodine) manage by vol-oxidation in the head-end process. In this paper, the key influence factors (such as temperature, oxidizing atmosphere and so on) and applications characteristics in the head-end process for reprocessing of spent fuel by vol-oxidation treatment are expounded synthetically.