核电厂液态流出物中锶-89、锶-90、铁-55、铁-59和镍-63的联合快速分析方法

摘要/Abstract

摘要： 锶-89、锶-90、铁-55、铁-59和镍-63是核电厂液态流出物中重点关注的核素。本建立了一种联用四级树脂柱快速分析液态流出物样品中锶-89、锶-90、铁-55、铁-59和镍-63的方法,该方法通过阳离子交换树脂富集样品中的阳离子,再依次通过锶树脂分离和纯化锶、TRU树脂分离和纯化铁、镍树脂分离和纯化镍,用电感耦合等离子体发射光谱仪测定化学回收率,用液体闪烁谱仪测定放射性计数率,计算出样品中各核素的活度浓度。典型条件下,样品量为1.0 L,测量时间为30 min,其方法探测下限可达到:锶-89为0.07 Bq/L、锶-90为0.05 Bq/L,铁-55为0.34 Bq/L,铁-59为0.11 Bq/L,镍-63为0.16 Bq/L。

关键词: 液态流出物, 锶-89、锶-90、铁-55、铁-59和镍-63, 联合快速分析, 分离富集, 液闪计数法

Abstract: Strontium-89, strontium-90, iron-55, iron-59 and nickel-63 are the major radionuclides concerned in liquid effluent of nuclear power plant. In this study, a method for rapid analysis of strontium-89, strontium-90, iron-55, iron-59 and nickel-63 in liquid effluent by four-stage resin column was established. The cation in the sample was enriched by cation exchange resin; and then strontium was separated and purified by strontium resin; iron was separated and purified by TRU resin; nickel was separated and purified by nickel resin. The chemical recovery rate was determined by ICP-OES; radioactive counting rate was determined by LSC; and then the activity concentration of each nuclide in the sample was calculated. Under typical conditions, the amount of sample is 1.0 L, and the measurement time is 30 min, the minimum detectable activity can reach 0.07 Bq/L for strontium-89, 0.05 Bq/L for strontium-90, 0.34 Bq/L for iron-55, 0.11 Bq/L for iron-59, and 0.16 Bq/L for nickel-63.

Key words: liquid effluent, strontium-89,strontium-90,iron-55,iron-59 and nickel-63, combined rapid analysis, separation and enrichment, liquid scintillation counting

中图分类号:

TL75+1

方春鸣, 姜冬, 郭小翠, 莫念. 核电厂液态流出物中锶-89、锶-90、铁-55、铁-59和镍-63的联合快速分析方法[J]. 辐射防护, 2024, 44(5): 469-475.

FANG Chunming, JIANG Dong, GUO Xiaocui, MO Nian. A combined rapid analytical method for strontium-89, strontium-90, iron-55, iron-59 and nickel-63 in liquid effluent of nuclear power plant[J]. RADIATION PROTECTION, 2024, 44(5): 469-475.

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