建筑材料天然放射性测试衰变链平衡时间探讨  

Discussion on the balance time of the natural radioactive decay chain of building materials

作　　者：李国庆 林盛 罗宇成 LI Guoqing;LIN Sheng;LUO Yucheng(Zhejiang Construction Engineering Quality Inspection Station Co.Ltd.,Hangzhou 310012,china)

机构地区：[1]浙江省建设工程质量检验站有限公司,浙江杭州310012

出　　处：《新型建筑材料》2024年第5期141-143,共3页New Building Materials

摘　　要：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。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 potassium-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.

关 键 词：建筑材料 放射性比活度 照射指数 

分 类 号：TU50[建筑科学—建筑技术科学]