基于湿法氧化法测量放射性废树脂中3H和14C的方法

基于湿法氧化法对核电厂产生的放射性废树脂进行前处理，建立了树脂中³H和¹⁴C的测量方法，分析了影响方法回收率的因素，并对国内某核电厂废树脂中的³H和¹⁴C进行了测量。结果表明，H₂O₂浓度对方法回收率影响最大，在最优的氧化条件下，方法回收率达96.8%；³H和¹⁴C最小可探测比活度分别为41 Bq/g和1.3 Bq/g；¹⁴C测量结果与《生物样品中¹⁴C的分析方法 氧弹燃烧法》(GB/T 37865-2019)的测量结果相比，无显著性差异，¹⁴C测量精密度为10.2%。对国内某核电厂废树脂进行测量，³H和¹⁴C的平均比活度分别为（6 134 ±640） Bq/g和（2 724±147） Bq/g。

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.