Thoron exposure in the radon-thoron prone area of the Adamawa Region, Cameroon

IF 1.6 3区工程技术 Q3 CHEMISTRY, INORGANIC & NUCLEAR Applied Radiation and Isotopes Pub Date : 2024-09-03 DOI:10.1016/j.apradiso.2024.111498

Soumayah Bachirou , Saïdou , Rosaline Mishra , Chutima Kranrod , Masahiro Hosoda , Sabahet Jalaluddin , Balvinder K. Sapra , Moise Godfroy Kwato Njock , Shinji Tokonami

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Abstract

The radon-prone area of the Adamawa region is characterized by high radon concentrations, where no low-risk area was observed. This study aims to investigate about indoor thoron concentration in this area, using RADUET detectors, thoron progeny monitors and DTPS/DRPS. The indoor thoron concentration ranged between 17 and 1000 Bq m⁻³, with an average of 131 Bq m⁻³. 36% of dwellings have thoron concentration less than 100 Bq m⁻³ while 28% are above 300 Bq m⁻³. The thoron equilibrium factor of 0.04 was found to be two times higher than the globally assumed value. Thoron progeny contributes on average to 26% (1.9 mSv y⁻¹) of the total inhalation dose. The excess lifetime cancer risk due to thoron progeny is about 5%. These results justify that thoron cannot be neglected when assessing radiation doses. As only radon is regulated, such study will contribute to accelerate the regulation on thoron.

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喀麦隆阿达马瓦大区氡气多发区的氡接触情况。

阿达马瓦地区氡易发区的特点是氡浓度高，没有发现低风险区。本研究旨在使用 RADUET 探测器、钍原监测器和 DTPS/DRPS 对该地区的室内钍浓度进行调查。室内钍浓度介于 17 和 1000 Bq m-3 之间，平均为 131 Bq m-3。36% 的住宅的钍浓度低于 100 Bq m-3，28% 的住宅的钍浓度高于 300 Bq m-3。研究发现，0.04 的钍平衡因子比全球假定值高出两倍。钍原平均占总吸入剂量的 26%（1.9 mSv y-1）。托龙后代造成的终生癌症超额风险约为 5%。这些结果证明，在评估辐射剂量时不能忽视钍。由于目前只对氡进行监管，这项研究将有助于加快对钍的监管。

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来源期刊

Applied Radiation and Isotopes 工程技术-核科学技术

CiteScore

3.00

自引率

12.50%

发文量

406

审稿时长

13.5 months

期刊介绍： Applied Radiation and Isotopes provides a high quality medium for the publication of substantial, original and scientific and technological papers on the development and peaceful application of nuclear, radiation and radionuclide techniques in chemistry, physics, biochemistry, biology, medicine, security, engineering and in the earth, planetary and environmental sciences, all including dosimetry. Nuclear techniques are defined in the broadest sense and both experimental and theoretical papers are welcome. They include the development and use of α- and β-particles, X-rays and γ-rays, neutrons and other nuclear particles and radiations from all sources, including radionuclides, synchrotron sources, cyclotrons and reactors and from the natural environment. The journal aims to publish papers with significance to an international audience, containing substantial novelty and scientific impact. The Editors reserve the rights to reject, with or without external review, papers that do not meet these criteria. Papers dealing with radiation processing, i.e., where radiation is used to bring about a biological, chemical or physical change in a material, should be directed to our sister journal Radiation Physics and Chemistry.