摘要
本文报道1987年初至1988年底上海市环境天然贯穿辐射水平调查的方法和结果。全市市区和郊县分别以1.5×1.5 km 和5×5 km 网格均匀布点178和253个。结果表明:(1)全市原野、道路和建筑物室内γ辐射剂量率(均指离地1m 高处的空气吸收剂量率,下同)分别为5.45、5.99和9.70×10^(-8)Gy·h^(-1);按人口加权均值分别为5.49、6.72(市区道路)和9.69×10^(-8)Gy·h^(-1)。(2)宇宙射线电离成分(不包括中子贡献)所致空气吸收剂量率按人口加权的室内和室外均值分别为2.47和2.88×10^(-8)Gy·h^(-1)。(3)天然γ辐射、宇宙射线和天然贯穿辐射所致上海市居民的人均年有效剂量当量分别为0.54、0.22和0.76 mSv;所致集体年有效剂量当量分别为0.39、0.54和0.93×10~4人·Sv。
The methods and results of the investigation on natural penetrating radiation level in Shang-hai City from 1987 to 1988 are presented.178 1.5×1.5 km-grid measuring points in the urban areasand 253 5×5 km-grid measuring points in suburban areas were set unformly up.The results showthat:(1)The point-weighted average values of natural γ radiation dose rate for field,road and insidebuildings are 5.45,5.99 and 9.70×10^(-8)Gy·h^(-1),for which the population-weighted average valuesare 5.49,6.72 and 9.69×10^(-8)Gy·h^(-1) respectively;(2)The population-weighted average values ofthe dose rate indoor and outdoor from cosmic ray are 2.47and 2.88×10^(-8)Gy·h^(-1),respectively;(3)The annual effective dose equivalents from natural γ radiation,cosmic ray and natural penetrating ra-diation are 0.54,0.25 and 0.76 mSv respectively,and correspondingly,the annual collective effectivedose equivalents are 0.39,0.54 and 0.93×10~4 man·Sv respectively.
出处
《辐射防护》
CAS
CSCD
北大核心
1991年第4期275-281,共7页
Radiation Protection
关键词
天然贯穿辐射
天然Γ辐射
宇宙射线
Natural Penetrating Radiation
Natural Gamma-Radiation
Dose Rate
Investigation
Shanghai
