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建筑材料天然放射性测试衰变链平衡时间探讨

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依据GB 6566-2010《建筑材料放射性核素限量》对常见的6种建筑材料进行了放射性测试,采集了不同平衡时间节点6种建筑材料放射性核素镭-226、钍-232、钾-40的放射性比活度,分析了这3种放射性比活度在不同平衡时间下测试结果的规律性,研究得出放射性核素镭-226、钍-232、钾-40的放射性比活度在平衡时间为7 d时,测试值最为稳定且接近真实值.
Discussion on the balance time of the natural radioactive decay chain of building materials
This article has carried out a large number of radioactive testing on six common building materials according to the national standard GB 6566-2010"Radionuclide Limit of Building Materials",and collected specific activities of 6 kinds of building materials radioactive nuclides at different equilibrium time nodes,namely radionuclide radium-226,thorium-232 and potas-sium-40.The regularity of the detection results of these three specific activities at different equilibrium times was analyzed,and obtain the conclusion that the specific activity of radioactive nuclides radium-226,thorium-232 and potassium-40 is most stable and close to the true value when the equilibrium time is 7 days.

building materialsradioactivityirradiation index

李国庆、林盛、罗宇成

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浙江省建设工程质量检验站有限公司,浙江杭州 310012

建筑材料 放射性比活度 照射指数

2024

新型建筑材料
中国新型建筑材料工业杭州设计研究院

新型建筑材料

CSTPCD
影响因子:0.569
ISSN:1001-702X
年,卷(期):2024.51(5)