南海岛礁工程中建筑材料的天然放射性核素含量及辐射水平评价

辐射防护 ›› 2020, Vol. 40 ›› Issue (1): 23-30.

南海岛礁工程中建筑材料的天然放射性核素含量及辐射水平评价

林武辉^1,2, 陈肖霞², 余克服^1,2, 刘昕明³, 莫珍妮³, 冯亮亮⁴, 何贤文⁴

1.广西南海珊瑚礁研究重点实验室,南宁 530004;
2.广西大学海洋学院,南宁 530004;
3.广西海洋研究院,南宁 530022;
4.广西壮族自治区辐射环境监督管理站,南宁 530222

收稿日期:2019-04-04 发布日期:2020-05-15
作者简介:林武辉(1987—),男,2009年本科毕业于厦门大学海洋科学专业,2015年博士毕业于清华大学核科学与技术专业。E-mail: linwuhui8@163.com
基金资助:
国家自然科学基金项目(91428203,41906043);广西自然科学基金(2017GXNSFBA198096,2019GXNSFAA185006)。

Natural radionuclides and radiological assessment for building materials used in reef engineering in the South China Sea

LIN Wuhui^{1, 2}, CHEN Xiaoxia², YU Kefu^{1, 2}, LIU Xinming³, MO Zhenni³, FENG Liangliang⁴, HE Xianwen⁴

1.Guangxi Laboratory on the study of Coral Reefs in the South China Sea, Nanning 530004;
2.School of Marine Sciences, Guangxi University, Nanning 530004;
3. Guangxi Academy of Oceanography, Nanning, 530022;
4. Radiation-Environment Management and Monitoring Station of Guangxi Zhuang Autonomous Region, Nanning 530222

Received:2019-04-04 Published:2020-05-15

摘要/Abstract

摘要： 本研究利用高纯锗γ谱仪测量南海15个不同岛礁最主要的建筑材料——珊瑚砂和珊瑚骨骼碎屑中的放射性水平。结果表明,珊瑚砂中²³⁸U、²²⁶Ra、²²⁸Ra、⁴⁰K的平均比活度分别为24.8 Bq/kg、2.38 Bq/kg、2.10 Bq/kg、11.6 Bq/kg;珊瑚骨骼碎屑中²³⁸U、²²⁶Ra、²²⁸Ra、⁴⁰K的平均比活度分别为28.7 Bq/kg、3.47 Bq/kg、12.6 Bq/kg、10.9 Bq/kg;南海岛礁珊瑚砂和珊瑚骨骼碎屑的放射性水平仅为国际推荐限值的1％～10％。通过对比国内外多种建筑材料的放射性水平,南海岛礁珊瑚砂和珊瑚骨骼碎屑拥有很低的放射性水平。珊瑚砂和珊瑚骨骼碎屑作为低放射性水平的建筑材料,可能可以应用于低本底实验室的建设,也可以作为高放射性建筑材料(煤灰渣、矿渣)生产过程中的添加剂(稀释剂),有效降低建筑材料的放射性水平。

关键词: 放射性核素, 岛礁工程, 建筑材料, 珊瑚, 煤灰渣, 低本底实验室

Abstract: Two dominant building materials of coral sand and coral skeleton were measured using high purity germanium γ spectrometry with high energy resolution for the first time. The activities of ²³⁸U, ²²⁶Ra, ²²⁸Ra, ⁴⁰K in coral sand and coral skeleton were 24.8 Bq/kg, 2.38 Bq/kg, 2.10 Bq/kg, 11.6 Bq/kg and 28.7 Bq/kg, 3.47 Bq/kg, 12.6 Bq/kg, 10.9 Bq/kg, respectively. The radioactive level of coral sand and coral skeleton was 1%-10% of the recommended value and limiting value provided by the international organizations. After comparison of radioactivity in a variety of building materials, we found that coral sand and coral skeleton had the lowest radioactive level. These building materials of low radioactivity can be potentially used in the construction of the low radioactive laboratory and used as dilution to reduce radioactivity during the production of building materials (coal ash) with high radioactivity.

Key words: radionuclide, reef engineering, building material, coral, coal ash, low radioactivity laboratory

中图分类号:

X822

林武辉, 陈肖霞, 余克服, 刘昕明, 莫珍妮, 冯亮亮, 何贤文. 南海岛礁工程中建筑材料的天然放射性核素含量及辐射水平评价[J]. 辐射防护, 2020, 40(1): 23-30.

LIN Wuhui, CHEN Xiaoxia, YU Kefu, LIU Xinming, MO Zhenni, FENG Liangliang, HE Xianwen. Natural radionuclides and radiological assessment for building materials used in reef engineering in the South China Sea[J]. RADIATION PROTECTION, 2020, 40(1): 23-30.

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