镍特效树脂分离富集核电厂液态流出物中的63Ni及其测量方法研究

为准确评估核电厂液态排放对公众造成的辐射影响，需对液态流出物中排放量较大、半衰期较长的⁶³Ni进行分析。本工作以镍特效树脂作为分离纯化材料，结合阳离子树脂、原子吸收光谱和液闪谱仪，建立了快速分析核电厂液态流出物中⁶³Ni的方法。用本工作建立的方法和GB/T 14502-1993方法比对分析了核电厂的液态流出物样品，化学回收率均高于70%，方法探测下限为0.005 Bq/L，比对结果的E_n值均远小于1，表明该方法的分析结果准确可靠。相比于GB/T 14502-1993方法，本方法操作简单、分离流程短、工作效率高，适用于核电厂液态流出物中⁶³Ni的富集和分离。

Application of Ni Specific Resin on Separation,Enrichment and Determination of 63Ni in Effluent of Nuclear Power Plant

⁶³Ni with larger amount of emission and longer half-life in effluent of nuclear power plant should be analyzed, so that the impact of emission from the nuclear power plant on the public can be evaluated accurately. Combined with the enrichment of cationic resin, the separation of nickel specific resin, atomic absorption spectrometer and liquid scintillation spectrometry, a rapid analysis method of ⁶³Ni was established for the effluent of nuclear power plant. Comparison and analysis of liquid effluent samples of nuclear power plant by the establishment method and the national standard GB/T 14502-1993 method, the chemical yield is higher than 70%, the detection limit of this method is 0.005 Bq/L, and the E_n value of the comparison results is far less than 1, indicating that the analysis result of this method is accurate and reliable. In comparison with the national standard method, this method has the advantages of simplicity, fewer steps of separation, higher working efficiency, and is suitable for enrichment and separation of ⁶³Ni in effluent of nuclear power plant.