Environmental Radon and Thoron Progeny Concentrations in Fujan Province of China
Environmental Radon and Thoron Progeny Concentrations in Fujan Province of China
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DOI：
10.1093/oxfordjournals.rpd.a032986
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发表时间：
2000
影响因子：
1
通讯作者：
W. Zhuo;T. Iida;X. Yang
中科院分区：
文献类型：
--
作者：
W. Zhuo;T. Iida;X. Yang
采用滤波法对福建省土壤中238U和232Th超标的土壤进行了环境氡及其子体浓度的调查。平衡当量氡和氡浓度(EEC、Rn和Tn)的平均值室内分别为12.9Bq.m-3和0.87Bq.m-3，室外为9.7Bq.m-3和0.39Bq.m-3。在地下和铁路隧道中都观察到了非常高浓度的氡和氡子体。估计上述地区作业工人吸入氡和钍及其子体所致的平均附加有效剂量分别为7.75mSv.a-1和22.2mSv.a-1。此外，还研究了氡和氡子体的日变化、季节变化和高度分布。
Surveys of environmental radon and thoron progeny concentrations were carried out with the filter method in Fujian Province of China, where very high concentrations of 238 U and 232 Th in soil had been reported. The mean values of equilibrium-equivalent radon and thoron concentrations (EEC Rn and EEC Tn ) were 12.9 Bq.m -3 and 0.87 Bq.m -3 indoors, 9.7 Bq.m -3 and 0.39 Bq.m -3 outdoors in the general living environment. Very high concentrations of both radon and thoron progeny were observed in underground places and railway tunnels. The mean additional effective doses due to the inhalation of radon and thoron and their progeny were estimated to be 7.75 mSv.a -1 and 22.2 mSv.a -1 for workers in those places mentioned above. Furthermore, the diurnal/seasonal variations and height distributions of radon and thoron progeny were also studied.