摘要
本文报道了湖北省环境天然贯穿辐射水平调查的方法和结果。全省以25×25 km 网格均匀布点,共布设290个网格点,各类加密点385个。调查结果表明:(1)湖北省原野γ辐射剂量率按面积、人口和网格点(以下简称测点)的加权均值分别为60.8、58.5和60.9 nGy·h^(-1);(2)道路γ辐射剂量率按测点平均值为55.3 nGy·h^(-1);(3)室内γ辐射剂量率按人口和测点加权均值分别为94.5和93.2 nGy·h^(-1);(4)宇宙射线电离成分(不包括中子)所致空气吸收剂量率按测点和人口加权均值,室内分别为27.8和26.3nGy·h^(-1),室外分别为31.8和30.4 nGy.h^(-1);(5)天然贯穿辐射剂量率,按测点和人口加权均值,室内分别为121.0和120.7 nGy·h^(-1),室外分别为92.8和88.9nGy·h^(-1);(6)宇宙射线、天然γ辐射和天然贯穿辐射所致居民人均年有效剂量当量分别为0.24、0.52和0.76 mSv;所致集体年有效剂量当量分别为1.2、2.5和3.7×10~4人·Sv。
The methods and results of the investigation on natural penetrating radiation level in HubeiProvince are presented,290 25×25 km-grid measuring points were set unformly up all over the province,with 385 densely measuring points of different types added.The results show that:(1)Theareaweighted,population-weighted and point-weighted average value of natural γ radiation dose ratefor field is 60.8,58.5 and 60.9 nGy·h^(-1),respectively;(2)The point-weighted average value ofnatural γ radiaton dose rate for road is 55.3 nGy·h^(-1);(3)The population-weighted and point-weighed average value of natural γ radiation dose rate inside buildings is 94.5 and 93.2×10nGy·h^(-1),respectively;(4)The point-weighted and population-weighted average value of the doserate inside buildings from cosmic ray is 27.8 and 26.3 nGy·h^(-1),and outside buildings is 31.8 and30.4 nGy·h^(-1),respectively;(5)The point-weighted and population-weighted average value ofnatural penetrating radiation dose rate inside buildings is 121.0 and 120.7 nGy·h^(-1),outsidebuildings is 92.8 and 88.9 nGy·h^(-1),respectively;(6)The annual effectivedose equivalent fromcosmic ray,natural γ radiation and natural penetrating radiation is 0.24,0.52 and 0.76 mSv,respectively;and correspondingly,the annual collective effective dose equivalent is 1.2,2.5 and3.7×10~4 man·Sv,respectively.
出处
《辐射防护》
CAS
CSCD
北大核心
1992年第4期290-299,共10页
Radiation Protection
关键词
Γ辐射
湖北
天然放射性
剂量当量
Natural Penetrating Radiation
Natural Gamma-Radiation
Dose
Rate
Investigation
Hubei
