基于湿法氧化法测量放射性废树脂中^(3)H和^(14)C的方法

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

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^(3)H和^(14)C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^(3)H和^(14)C进行了测量。结果表明,H 2O 2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%;^(3)H和^(14)C最小可探测比活度分别为41 Bq/g和1.3 Bq/g;^(14)C测量结果与《生物样品中^(14)C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,^(14)C测量精密度为10.2%。对国内某核电厂废树脂进行测量,^(3)H和^(14)C的平均比活度分别为(6134±640)Bq/g和(2724±147)Bq/g。

A method based on wet oxidation method was developed for determining^(3)H and^(14)C in the radioactive waste resin produced from nuclear power plant.The affecting factors of method recovery were analyzed,and the^(3)H and^(14)C in the waste resin from a domestic nuclear power plant were measured.The results show that the concentration of H 2O 2 has the greatest influence on the recovery of the method.The minimum detectable specific activity for^(3)H and^(14)C is 41 Bq/g and 1.3 Bq/g,respectively.There is no significant difference between the measurement results of^(14)C and that of Analysis method of^(14)C in biological samples—Oxgen bomb combustion method(GB/T 37865-2019),the measurement precision of^(14)C is 10.2%.The average specific activity of^(3)H and^(14)C is(6134±640)Bq/g and(2724±147)Bq/g in the waste resin of a domestic nuclear power plant.