吉林省天然本底辐射水平及其所致居民剂量  

Level of natural background radiation and dose to population in Jilin Provnice

作　　者：李万熙[1] 陈惠英[1] 鞠翠香[1] 李福林[1] 李相镐[1] 

机构地区：[1]吉林省卫生防疫站

出　　处：《中华放射医学与防护杂志》1994年第4期246-248,共3页Chinese Journal of Radiological Medicine and Protection

摘　　要：作者报道了吉林省夭然本底辐射水平及其对公众所致的内、外照射剂量。结果表明，宇宙射线电离成分空气吸收剂量率人口加权平均值为３．２×１０－８Ｇｙ·ｈ－１．地表γ辐射空气吸收剂量率人口加权平均值，室外为７．７×１０－８Ｇｙ·ｈ－１，室内为９．８×１０－８Ｇｙ·ｈ－１．室内、外空气中氡平均浓度分别为８．７Ｂｑ·ｍ－３和５．８Ｂｑ·ｍ－３。天然放射性核素Ｕ、Ｔｈ、２２６Ｒａ，４０Ｋ的平均含量分别是：食品中为３．７×１０－２Ｂｑ·ｋｇ－１，２．４×１０－２Ｂｑ·ｋｇ－１，１４．７×１０－２Ｂｑ·ｋｇ－１和８１．５Ｂｑ·ｋｇ－１；饮用水中为２．３×１０－２Ｂｑ·Ｌ－１，０．１×１０－２Ｂｑ·Ｌ－１，１．１×１０－２Ｂｑ·Ｌ－１和０．３Ｂｑ·Ｌ－１。由天然本底所致公众人均年有效剂量当量约为１．５ｍＳｖ．The natural background radiation in Jinn Province ovas measured and the population dose was estimated.The results showed that the population-weigh ted average value of the absorbed dose rate in air from cosmic ray ionization was 3. 2×10-3 Gy .h-1. The average absorbed dose rates in air from terrestrial γ radiation were 7 .7 × 10-8 Gyh-1 outdoors and 9.9 × 10-8 Gy.h-1 indoors. The ayerage values of radon in air were 8 .7 Bq· m-3 outdoors and 5.8 Bq·m-3 indoors. The average concentration of natural radionuclides U, Th,226Ra, and 40K were 3.7 × 10-'2, 2.4 × 10-2, 14.7 × 10-2 and 81 .5 Ba·kg-1 in food, and 2.3, 0.1, 1.1, and 0.3 Bq·L-1in drinking water, respectiyely. The total annual individual average effective dose equiyalent from natural background radiation was about 1.5 mSv.

关 键 词：宇宙射线 氡 有效剂理当量 

分 类 号：X591[环境科学与工程—环境工程]