Dosimetric evaluation of thoron exposure in the three typical rural indoor environments of China
Dosimetric evaluation of thoron exposure in the three typical rural indoor environments of China
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DOI：
10.1007/s10967-014-3798-2
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发表时间：
2015-02
影响因子：
1.6
通讯作者：
Lei Zhang;Q. Guo;Shanqiang Wang
中科院分区：
文献类型：
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作者：
Lei Zhang;Q. Guo;Shanqiang Wang
为评价室内环境中的钍射气暴露，对我国3个典型农村住宅进行了现场测量，测量了室内环境中钍射气浓度及其粒径分布，并采用剂量学方法评价了室内环境中的暴露剂量。结果表明，农村室内环境中的钍射气子体粒径分布（AMAD：76.5 nm; GSD：2.7）远小于城市（AMAD：115 nm; GSD：2.0），这使得农村环境中的钍射气剂量转换因子[307.4 nSv/（Bq m− 3 h −1）]远高于城市[113.4 nSv/（Bq m− 3 h −1）]。高本底区阳江泥房的钍射气暴露量最高（10.12 mSv a-1）。
In order to evaluate thoron exposure in indoor environments, field measurements of both concentration and its size distribution were carried out in three typical rural residential houses in China, and exposure dose was evaluated using dosimetric method. Results show that the thoron progeny size distributions of rural indoor environments (AMAD: 76.5 nm; GSD: 2.7) are much smaller than those of urban (AMAD: 115 nm; GSD: 2.0), which makes the dose conversion factors of thoron in rural environments [307.4 nSv/(Bq m−3h−1)] are much higher than those in urban [113.4 nSv/(Bq m−3h−1)]. The highest thoron exposure (10.12 mSv a−1) was found in mud house of Yangjiang, the high radiation background area.