Studies are being conducted for the past few decades in and around the uranium mining sites across the globe to identify environmental nuclear radiation risk to the common public. The area near Dasarlapally village was identified for uranium exploration by the AMDER, Hyderabad. The present study was carried out to measure the indoor radon and thoron activity concentrations in the dwellings of Dasarlapally village. For this purpose different types of dwellings were chosen randomly across the village. The measured annual average concentration of radon and thoron in dwellings were found to be 141 ± 42 and 139 ± 77 Bqm-3, respectively, and the calculated annual effective inhalation dose due to radon was determined to be 3.5 mSv. Seasonal variation and diurnal variation of radon and thoron activity concentration were investigated. The variation of radon and thoron activity concentration in different types of dwellings was also studied, and the variation was found to be statistically insignificant. The uncertainty propagated in the effective inhalation dose due to thoron was discussed.

中文翻译：

---

拟建铀矿场附近的室内氡和钍：印度特兰加纳州达萨拉帕利村的案例研究。

在过去的几十年里，全球各地的铀矿开采场及其周围正在进行研究，以确定对普通公众的环境核辐射风险。Dasarlapally 村附近的地区被海得拉巴的 AMDER 确定为进行铀矿勘探。本研究旨在测量 Dasarlapally 村住宅的室内氡和钍活度浓度。为此，村里随机选择了不同类型的住宅。测得的住宅中氡和钍的年平均浓度分别为 141 ± 42 和 139 ± 77 Bqm-3，计算的氡引起的年有效吸入剂量确定为 3.5 mSv。研究了氡和钍活度浓度的季节变化和日变化。还研究了不同类型住宅中氡和钍活度浓度的变化，发现该变化在统计上不显着。讨论了由钍气引起的有效吸入剂量的不确定性。