Exposures from radon, thoron, and thoron progeny in high background radiation area in Takandeang, Mamuju, Indonesia
| Autor: | Shinji Tokonami, Miki Arian Saputra, Roza Indra Laksmana, Masahiro Hosoda, Tri Purwanti, Eka Djatnika Nugraha, Rokhmat Arifianto, Richard P. Hutabarat |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
Nuclear and High Energy Physics Science chemistry.chemical_element thoron Radon radon thoron progeny Condensed Matter Physics cr-39 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Nuclear Energy and Engineering chemistry 030220 oncology & carcinogenesis Environmental chemistry high background radiation area Thoron Progeny Safety Risk Reliability and Quality Waste Management and Disposal Instrumentation raduet Background radiation |
| Zdroj: | Nukleonika, Vol 65, Iss 2, Pp 89-94 (2020) |
| ISSN: | 0029-5922 |
| Popis: | The exposure from radon, thoron, and thoron progeny was measured for 45 dwellings in high background radiation area in Takandeang, Indonesia with ambient dose equivalent rate ranging from 0.34 μSv h−1 to 1.90 μSv h−1. The measurement was taken using passive radon and thoron discriminative detector and thoron progeny detector. This measurement was taken from November 2018 to October 2019, and within one month the detector would be replaced with a new detector. The concentrations of radon, thoron, and thoron progeny were calculated as 42–490 Bq m−3, 20–618 Bq m−3, and 4–40 Bq m−3, respectively. The concentrations for outdoor were 49–435 Bq m−3, 23–457 Bq m−3, and 4–37 Bq m−3, respectively, and the annual effective dose was 9.8–28.6 mSv y−1. Based on the result of Spearman’s correlations analysis between the indoor radon and thoron concentrations and between the indoor thoron progeny and thoron concentrations, we suggest that exposure to thoron cannot be predicted from exposure to radon, and the equilibrium equivalent thoron concentration has a large uncertainty when it is estimated from thoron concentration assuming a single thoron equilibrium factor. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|