摘要
本文报道了湖南省环境天然贯穿辐射水平调查的方法和结果。全省以25×25km 网格均匀布点,共布设网格点309个,各类加密点1007个。调查结果表明:(1)湖南省原野γ辐射剂量率按测点、人口和面积的加权均值分别为7.11、6.90和7.07×10^(-8)Gy·h^(-1);(2)道路γ辐射剂量率按测点平均值为7.05×10^(-8)Gy·h^(-1);(3)室内γ辐射剂量率按测点和人口加权均值分别为10.43和10.56×10^(-8)Gy·h^(-1);(4)宇宙射线电离成分所致空气吸收剂量率按测点和人口加权均值,室内分别为2.67和2.66×10^(-8)Gy·h^(-1);室外分别为3.00和2.98×10^(-8)Gy·h^(-1);(5)天然贯穿辐射(不包括中子成分)剂量率按测点和人口加权均值,室内分别为13.1和13.2×10^(-8)Gy·h^(-1),室外分别为10.1和9.88×10^(-8)Gy·h^(-1);(6)天然γ辐射、宇宙射线和天然贯穿辐射所致湖南省人均年有效剂量当量分别为0.58、0.24和0.82mSv,所致集体年有效剂量当量分别为3.1、1.3和4.4×10~4人·Sv。
The methods and results of the investigation of natural penetrating radiation level in Hunan Province are presented.309 25×25km-netted measuring points were set unformly up all over theprovince,with 1007 densely measuring points of different type added.The results showed that:(1)thepoint-weithted,area-weighted and population-weighted average value of natural γ radiation dose rateover field was 7.11,6.90 and 7.07×10^(-8)Gy·h^(-1),respectively;(2)The point-weighted average val-ue of natural γ radiation dose rate over road was 7.05×10^(-8)Gy·h^(-1);(3)The point-weighted andpopulation-weighted average value of natural γ radiation dose rate inside buildings was 10.43 and10.56×10^(-8)Gy·h^(-1);(4)The point-weighted and population-weighted average value of the doserate inside buildings from cosmic ray was 2.67 and 2.66×10^(-8)Gy·h^(-1),and outside buildings was3.00 and 2.98×10^(-8)Gy·h^(-1),respectively;(5)The point-weighted and population-weighted aver-age value of natural penetrating radiation dose rate inside buildings was 13.1 and 13.2×10^(-8)Gy·h^(-1),and outside buildings was 10.1 and 9.88×10^(-8)Gy·h^(-1),respectively;(6)The annual effectivedose equivalent from natural γ radiation,cosmic ray and natural penetrating radiation was 0.58,0.24and 0.82 mSv,respectively,and correspondingly,the annual collective effective dose equivalent was3.1,1.3 and 4.4×10~4 man·Sv,respectively.
出处
《辐射防护》
CAS
CSCD
北大核心
1991年第2期124-135,共12页
Radiation Protection
关键词
环境
天然贯穿辐射
剂量率
调查
Environment
Natural Radiation
Natural Penetrating Radiation
Dose Rate
Investigation
Hunan
