摘要
报道了福建省泉州市环境放射性水平调查方法和结果。调查结果表明 :(1)泉州市原野γ辐射剂量率为 72 .3～ 16 5 .1n Gy/ h,按测点和人口加权均值为 111.5 n Gy/ h和 110 .9n Gy/ h,高于福建省的平均值 (分别为 92 .6 n Gy/ h和87.1n Gy/ h) ,是 UNSCEAR1982年报告中给出的世界陆地γ辐射剂量率按人口加权均值 (5 0 n Gy/ h)的 2 .2 2倍。(2 )泉州市道路γ辐射剂量率测值范围为 6 5 .8～ 14 9.5 n Gy/ h,均值 113.7n Gy/ h,略高于福建省均值 10 6 .4 n Gy/ h。 (3)泉州市建筑物室内天然γ辐射剂量率测值范围为 12 8.9～ 2 86 .3n Gy/ h,按测点和人口加权均值分别为 190 .7n Gy/ h和 188.5 n Gy/h。不同建筑材料建筑物室内天然γ辐射剂量率由高到低的顺序依次为花岗石房 >砖与混凝土房 >煤渣砖房 >砖木、土木房。(4)泉州市天然γ辐射、宇宙和线射天然贯穿辐射所致居民人均年有效剂量当量分别为 1.0 5 m Sv、0 .16 m Sv和1.2 1m Sv,全区集体年有效剂量当量分别为 0 .76× 10 4人· Sv,0 .12× 10 4人·Sv,0 .88× 10 4人· Sv。(5 )土壤中 2 2 6 Ra、2 32 Th、4 0 K含量均值分别为 71.3Bq/ kg、6 8.8Bq/ kg、6 8.8Bq/ kg、94 3.7Bq/ kg。(6 )地下水中2 2 6 Ra、U、Th、Rn浓度均值分别为 31.9m Bq/ L、0 .
The methods and results of the investigation on natural penetrating radiation level in Quanzhou from 1999 to 2000 were presented.The results showed that:(1)The point weighted and population weighted average value of natural γ radiation dose rate for field was 111.5nGy/h and 110.9nGy/h,respectively;(2)The point weighted average value of natural γ radiation dose rate for road was 113.7nGy/h;(3)The point weighted and population weighted average value of natural γ radiation dose rate inside buildings was 190.7nGy/h and 188.5nGy/h,respectively;(4)The annual effective does equivalent from natural γ radiation,cosmic ray and natural penetrating radiation was 1.05 mSv?0.16 mSv and 1.21 mSv,respectively;and correspondingly,the annual collective effective dose equivalent was 0.76×10 4man·Sv,0.12×10 4man·Sv,0.88×10 4man·Sv,respectively;(5)The average contents of 226 Ra, 232 Th and 40 K in soil was 71.3Bq/kg,68.8Bq/kg,and 943.7Bq/kg,respectively;(6)The average concentration 226 Ra,U,Th and Rn in groundwater was 31.9mBq/L,0.53μg/L,2.58μg/L and 32.6Bq/L,respectively;and correspondingly,the activity range in groundwater was 13.0～96.4mBq/L for gross alpha activity and 15.0～231mBq/L for gross beat activity.
出处
《重庆环境科学》
北大核心
2002年第2期65-68,共4页
Chongqing Environmental Science
基金
福建省自然科学基金 (D991 0 0 1 6)
华侨大学博士科研起动资金联合资助
