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基于湿法氧化法测量放射性废树脂中3H和14C的方法

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

    摘要
  • 摘要: 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。

     

    Abstract: 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.

     

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