哈密地区环境中氡及其子体浓度所致居民剂量评价

MEASUREMENTS OF RADON AND ITS DECAY PRODUCT CONCENTRATION IN THE ENVIRONMENTAL IN HAMI AREA AND ASSESSMENT OF INONIZING RADIATION EXPOSURE OF THE POPULATION

用双滤膜法和Ｔｈｏｍａｓ三段法测定了哈密地区环境空气中氡及其子体浓度．结果表明，室内氡及其子体浓度平均值分别为２８．ＯＢｑ·ｍ－３和７．５×１０－８Ｊ·ｍ－３，室外氡及其子体浓度平均值分别为１０．７Ｂｑ·ｍ－３和３．１×１０－３Ｊ·ｍ－３．氡及其子体所致居民人均有效剂量当量为１．０３ｍＳｖ·ａ－１，集体有效剂量当量为４．２×１０２ｍａｎ·Ｓｖ．

Concentration of Radon and decay product in envi ronment of Hamiarea were measured with the double filter membrane method and Thomas three-stage method. The results showed that the average value of Radon and its decay product concentration inside buildings is 28.0Bq.m-3 and 3.7mWL,outside buildings is 10.7Bqm-3 and 105mWL,respectively.The annual effective dose equivalent from Radon and its decay is 1.03mSc. a-1. the annual collective effective dose equivalent is 4. 2×102man.Sv.