放化分离-液闪测量联合分析核电厂废树脂中的55Fe和63Ni

辐射防护 ›› 2022, Vol. 42 ›› Issue (4): 280-286.

放化分离-液闪测量联合分析核电厂废树脂中的⁵⁵Fe和⁶³Ni

马莉娜, 王路生, 宋丽娟, 张辉, 戴雄新

中国辐射防护研究院,核药研发转化与精准防护山西省重点实验室,太原 030006

收稿日期:2021-06-04 出版日期:2022-07-20 发布日期:2022-08-15
通讯作者: 戴雄新。E-mail:daixiongxin@cirp.org.cn
作者简介:马莉娜(1985—),女,2008年7月毕业于兰州大学放射化学专业,2017年毕业于中国辐射防护研究院环境科学专业,获硕士学位,助理研究员。E-mail:applemalina@126.com

Determination of ⁵⁵Fe and ⁶³Ni in spent resin of nuclear power plant using radiochemical separation and liquid scintillation counting

MA Lina, WANG Lusheng, SONG Lijuan, ZHANG Hui, DAI Xiongxin

China Institute for Radiation Protection, Shanxi Provincial Key Laboratory for TranslationalNuclear Medicine and Precision Protection, Taiyuan 030006

Received:2021-06-04 Online:2022-07-20 Published:2022-08-15

摘要/Abstract

摘要： 建立了一种核电厂放射性废离子交换树脂中⁵⁵Fe和⁶³Ni的联合分析方法。将废树脂样品经芬顿氧化消解后,先用氢氧化钠沉淀法沉淀⁵⁵Fe和⁶³Ni,再用阴离子交换树脂联合丁二酮肟沉淀对杂质离子进行分离纯化,纯化后用液体闪烁计器测量。本方法对废树脂中⁶⁰Co、⁶⁵Zn、⁵⁴Mn等干扰核素的去污因子均大于10³。本方法对⁵⁵Fe和⁶³Ni的平均化学回收率分别为86%和90%,对废树脂中⁵⁵Fe和⁶³Ni的检测限分别为5.7 Bq/g、6.8 Bq/g。用加标样品对分析方法进行验证,预期值和测量值的偏差小于±10%。实验测得某核电厂一组一回路实际废树脂样品中⁵⁵Fe和⁶³Ni的平均活度浓度分别为(76.2±1.4)kBq/g和(120.0±5.1)kBq/g。

关键词: ⁵⁵Fe, ⁶³Ni, 废离子交换树脂, 液体闪烁计数器(LSC), 联合分析

Abstract: In this work, a method for sequential determination of ⁵⁵Fe and ⁶³Ni in spent resins of nuclear power plants was developed. After decomposing the spent resin sample, ⁵⁵Fe and ⁶³Ni ions were first precipitated in the form of hydroxide and subsequently purified by anion exchange chromatography and dimethylglyoxime precipitation. After purification, ⁵⁵Fe and ⁶³Ni were determined by liquid scintillation counting (LSC). The average chemical recovery rate of ⁵⁵Fe and ⁶³Ni was 86% and 90% respectively. The decontamination factors of interfering radionuclides such as ⁶⁰Co, ⁶⁵Zn and ⁵⁴Mn by the sequential determination method were higher than 1 000. The deviation of expected and measured values was less than ±10% through the validation of the analytical method with spiked samples. The measured average activities of ⁵⁵Fe and ⁶³Ni in a set of spent resin samples from its primary loop of a nuclear power plant were (76.2±1.4) kBq/g and (120.0±5.1) kBq/g, respectively.

Key words: ⁵⁵Fe, ⁶³Ni, spent ion-exchange resin, LSC, sequential determination

中图分类号:

O658.1+3

马莉娜, 王路生, 宋丽娟, 张辉, 戴雄新. 放化分离-液闪测量联合分析核电厂废树脂中的⁵⁵Fe和⁶³Ni[J]. 辐射防护, 2022, 42(4): 280-286.

MA Lina, WANG Lusheng, SONG Lijuan, ZHANG Hui, DAI Xiongxin. Determination of ⁵⁵Fe and ⁶³Ni in spent resin of nuclear power plant using radiochemical separation and liquid scintillation counting[J]. RADIATION PROTECTION, 2022, 42(4): 280-286.

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放化分离-液闪测量联合分析核电厂废树脂中的⁵⁵Fe和⁶³Ni

Determination of ⁵⁵Fe and ⁶³Ni in spent resin of nuclear power plant using radiochemical separation and liquid scintillation counting

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