中国的天然γ辐射剂量率水平  

Natural environmental γ radiation dose rate in China.

作　　者：王其亮[1] 

机构地区：[1]卫生部工业卫生实验所,北京100088

出　　处：《中华放射医学与防护杂志》2000年第5期358-362,共5页Chinese Journal of Radiological Medicine and Protection

摘　　要：目的　弄清中国天然γ辐射剂量率水平到底是多少。方法　用实际的数据资料分析和讨论各调查采用的仪器和方法的可靠性。结果　文献 [1]在调查中使用的质量控制仪器 (RSS 111)和方法与国际标准一致 ,是可行的 ;文献 [2 ]在调查中使用的质量控制仪器 (AEI)比国际标准偏低 10 % ,扣除仪器对宇宙辐射响应的方法导致其结果明显的系统偏低。结论　文献 [1]的结果较好地代表了中国天然γ辐射水平的实际情况。室内空气吸收剂量率人口加权平均值为 119 5nGy·h-1,室外为 80 3nGy·h-1,道路为 79 5nGy·h-1,所致全国居民人均年有效剂量为 6 84μSv ,集体年有效剂量为 9 6× 10 5人·Sv。Objective\ To clarify the levels of the natural environmental γ radiation dose rate in China. Methods Reliabilities of the instruments and methods used in both surveys [1,2] are evaluated by analysing and discussing practical data. Results The quality control instrument(RSS 111)and method used in the survey [1] are consistent with the international standard,and are reliable.The quality control instrument(AEI)of the survey [2] is about 10% lower than the international standard.And the method of deducting the response to cosmic radiation from meter reading for measuring natural γ radiation dose rate led to the lower results. Conclusions The data of survey [1] about natural γ radiation dose rats in China are representative.The population weighed average absorbed dose rates in air at 1 m above the ground from natural γ radiation are 80.3 nGy·h -1 ,119.5 nGy·h -1 and 79.5nGy·h -1 for outdoor,indoor,and roads, respectively.The annual average effective dose and annual collective effective dose to the population in China from natural γ radiation were estimated to be 684 μSv and 9.6×10 5 man·Sv,respectively.\;

关 键 词：天然Γ辐射 剂量率 中国 室内空气吸收 室外吸收 

分 类 号：R14[医药卫生—公共卫生与预防医学]