| Literature DB >> 31394926 |
Takoukam Soh Serge Didier1,2, Shinji Tokonami3, Masahiro Hosoda4, Takahito Suzuki4, Hiromi Kudo4, Oumarou Bouba1.
Abstract
Radon, thoron and associated progeny measurements have been carried out in 71 dwellings of Douala city, Cameroon. The radon-thoron discriminative detectors (RADUET) were used to estimate the radon and thoron concentration, while thoron progeny monitors measured equilibrium equivalent thoron concentration (EETC). Radon, thoron and thoron progeny concentrations vary from 31 ± 1 to 436 ± 12 Bq m-3, 4 ± 7 to 246 ± 5 Bq m-3, and 1.5 ± 0.9 to 13.1 ± 9.4 Bq m-3. The mean value of the equilibrium factor for thoron is estimated at 0.11 ± 0.16. The annual effective dose due to exposure to indoor radon and progeny ranges from 0.6 to 9 mSv a-1 with an average value of 2.6 ± 0.1 mSv a-1. The effective dose due to the exposure to thoron and progeny vary from 0.3 to 2.9 mSv a-1 with an average value of 1.0 ± 0.4 mSv a-1. The contribution of thoron and its progeny to the total inhalation dose ranges from 7 to 60 % with an average value of 26 %; thus their contributions should not be neglected in the inhalation dose assessment.Entities:
Keywords: Equilibrium factor; Rn–Tn discriminative detector; inhalation dose; ionogenic radiation exposure; radio ecology; radon; thoron
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Year: 2019 PMID： 31394926 DOI： 10.1080/10256016.2019.1649258
Source DB: PubMed Journal: Isotopes Environ Health Stud ISSN： 1025-6016 Impact factor: 1.675