Abstract: Using 1 kg spent resin wet oxidation bench, the feasibility hot test of spent resin wet oxidation process was carried out in a nuclear power base. The effect of real spent resin wet oxidation treatment was verified, and the safety of waste gas emission of the process system was evaluated. The contact dose rate of spent resin used in the test is 602-680 Sv/h, and the treatment capacity of spent resin in a single test is 1 kg. The results show that the decomposition rate of spent resin is more than 99% (calculated by COD value), and the carrying rate of tail gas for main nuclides ⁶⁰Co, ⁵⁴Mn, ¹³⁷Cs and ⁹⁰Sr is less than 0.001%. This study laid a solid foundation for further research on wet oxidation process of spent resin and scale-up of the testing device.

Key words: radioactive spent resin, wet oxidation, process validation