Determination of ³H and ¹⁴C in Radioactive Waste Resin of Nuclear Power Plant Based on Wet Oxidation Method

A method based on wet oxidation method was developed for determining ³H and ¹⁴C in the radioactive waste resin produced from nuclear power plant. The affecting factors of method recovery were analyzed, and the ³H and ¹⁴C in the waste resin from a domestic nuclear power plant were measured. The results show that the concentration of H₂O₂ has the greatest influence on the recovery of the method. The minimum detectable specific activity for ³H and ¹⁴C is 41 Bq/g and 1.3 Bq/g, respectively. There is no significant difference between the measurement results of ¹⁴C and that of Analysis method of ¹⁴C in biological samples—Oxgen bomb combustion method (GB/T 37865-2019), the measurement precision of ¹⁴C is 10.2%. The average specific activity of ³H and ¹⁴C is (6134±640) Bq/g and (2724±147) Bq/g in the waste resin of a domestic nuclear power plant.