238U、232Th、226Ra、137Cs在北山合头草中的转移系数研究

辐射防护 ›› 2025, Vol. 45 ›› Issue (4): 410-418.

²³⁸U、²³²Th、²²⁶Ra、¹³⁷Cs在北山合头草中的转移系数研究

凌辉¹, 夏子通¹, 赵伟², 马明清¹, 吴鹏³

1.核工业北京地质研究院国家原子能机构高放废物地质处置创新中心,北京 100029;
2.兰州大学甘肃省环境生物监测与修复重点实验室,兰州 730000;
3.南华大学资源环境与安全工程学院,湖南衡阳 421001

收稿日期:2024-07-01 发布日期:2025-07-28
作者简介:凌辉(1986—),男,2008年毕业于江西师范大学数字与应用数学专业,2012年硕士毕业于南华大学市政工程专业,2018年博士毕业于核工业北京地质研究院地质资源与地质工程专业,高级工程师。E-mail:lhui1986@126.com
基金资助:
国防科工局核设施退役与放射性废物治理专项(科工二司[2020]194号)。

Research on soil-to-plant transfer factor of ²³⁸U, ²³²Th, ²²⁶Ra, ¹³⁷Cs in Sympegma regelii Bunge from Beishan

LING Hui¹, XIA Zitong¹, ZHAO Wei², MA Mingqing¹, WU Peng³

1. Beijing Research Institute of Uranium Geology, CAEA Innovation Center for Geological Disposal of High Level Radioactive Waste, Beijing 100029;
2. Lanzhou University, Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, Lanzhou, 730000;
3. School of Resource & Environment and Safety Engineering, University of South China, Hunan Hengyang 421001

Received:2024-07-01 Published:2025-07-28

摘要/Abstract

摘要： 放射性核素从土壤到植物的转移系数是高放废物地质处置生物圈评价模型的关键参数之一,其取值和不确定性对评价结果影响较大。为获取北山地下实验室场址的转移参数及不确定性水平,选取了场址范围内优势植物——合头草,开展了放射性核素从土壤到植物的转移系数研究。通过对北山场址范围内代表性区域土壤和合头草样品的采集和分析,获得了土壤和合头草样品中天然放射性核素²³⁸U、²³²Th、²²⁶Ra和人工放射性核素¹³⁷Cs从土壤到合头草根部、茎部、叶部的转移系数及其不确定性水平。结果表明,天然放射性核素²³⁸U、²³²Th、²²⁶Ra在合头草茎部的转移系数高于根部和叶部,人工放射性核素¹³⁷Cs在合头草根部的转移系数大于茎部和叶部;天然放射性核素²³⁸U、²³²Th、²²⁶Ra转移系数的波动范围在1个数量级之内,人工放射性核素¹³⁷Cs的波动范围达到2个数量级;合头草各部位的核素转移系数波动范围呈现出叶部显著高于茎部和根部的特点。

关键词: 高放废物地质处置, 北山, 安全评价, 生物圈评价, 转移系数

Abstract: The transfer factor of radionuclides from soil to plants is one of the most important parameters in the biosphere assessment model of high-level radioactive waste disposal. The value and uncertainty of the transfer factors have significant impact on the assessment results. In order to obtain the transfer parameters and uncertainty level for the site of Beishan underground research laboratory, the dominant plant type plant Sympegma regelii Bunge was selected to carry out a preliminary study on the radionuclides transfer factor of soil to plant. In this paper, the natural radionuclides ²³⁸U, ²³²Th, ²²⁶Ra and artificial radionuclides ¹³⁷Cs in representative soil samples and Sympegma regelii Bunge were measured and analyzed; the transfer factor and uncertainty level of nuclides from soil to roots, stems and leaves of Sympegma regelii Bunge were obtained. The results showed that the transfer factor of natural radionuclides ²³⁸U, ²³²Th and ²²⁶Ra in stems were generally higher than those in roots and leaves, while the transfer factor of artificial radionuclides ¹³⁷Cs in roots were significantly higher than those in stems and leaves. The fluctuation range of transfer factor of natural radionuclides ²³⁸U, ²³²Th and ²²⁶Ra was within 1 order of magnitude, while the fluctuation range of artificial radionuclide ¹³⁷Cs was up to 2 orders of magnitude. The fluctuation range of radionuclide transfer factor showed that the leaves were significantly higher than that in the stems and roots.

Key words: high-level radioactive waste, Beishan, safety assessment, biosphere assessment, transfer factor

中图分类号:

X591

凌辉, 夏子通, 赵伟, 马明清, 吴鹏. ²³⁸U、²³²Th、²²⁶Ra、¹³⁷Cs在北山合头草中的转移系数研究[J]. 辐射防护, 2025, 45(4): 410-418.

LING Hui, XIA Zitong, ZHAO Wei, MA Mingqing, WU Peng. Research on soil-to-plant transfer factor of ²³⁸U, ²³²Th, ²²⁶Ra, ¹³⁷Cs in Sympegma regelii Bunge from Beishan[J]. RADIATION PROTECTION, 2025, 45(4): 410-418.

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²³⁸U、²³²Th、²²⁶Ra、¹³⁷Cs在北山合头草中的转移系数研究

Research on soil-to-plant transfer factor of ²³⁸U, ²³²Th, ²²⁶Ra, ¹³⁷Cs in Sympegma regelii Bunge from Beishan

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