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Passive-Type Radon Monitor Constructed Using a Small Container for Personal Dosimetry

The International Commission on Radiological Protection (ICRP) recently recommended a new dose conversion factor for radon based on the latest epidemiological studies and dosimetric model. It is important to evaluate an inhalation dose from radon and its progeny. In the present study, a passive rado...

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Autores principales: Tamakuma, Yuki, Kranrod, Chutima, Suzuki, Takahito, Watanabe, Yuki, Ploykrathok, Thamaborn, Negami, Ryoju, Nugraha, Eka Djatnika, Iwaoka, Kazuki, Janik, Mirosław, Hosoda, Masahiro, Tokonami, Shinji
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7460200/
https://www.ncbi.nlm.nih.gov/pubmed/32764464
http://dx.doi.org/10.3390/ijerph17165660
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author Tamakuma, Yuki
Kranrod, Chutima
Suzuki, Takahito
Watanabe, Yuki
Ploykrathok, Thamaborn
Negami, Ryoju
Nugraha, Eka Djatnika
Iwaoka, Kazuki
Janik, Mirosław
Hosoda, Masahiro
Tokonami, Shinji
author_facet Tamakuma, Yuki
Kranrod, Chutima
Suzuki, Takahito
Watanabe, Yuki
Ploykrathok, Thamaborn
Negami, Ryoju
Nugraha, Eka Djatnika
Iwaoka, Kazuki
Janik, Mirosław
Hosoda, Masahiro
Tokonami, Shinji
author_sort Tamakuma, Yuki
collection PubMed
description The International Commission on Radiological Protection (ICRP) recently recommended a new dose conversion factor for radon based on the latest epidemiological studies and dosimetric model. It is important to evaluate an inhalation dose from radon and its progeny. In the present study, a passive radon personal monitor was designed using a small container for storing contact lenses and its performance was evaluated. The conversion factor for radon ((222)Rn), the effect of thoron ((220)Rn) concentration and the air exchange rate were evaluated using the calibration chamber at Hirosaki University. The minimum and maximum detectable radon concentrations were calculated. The conversion factor was evaluated as 2.0 ± 0.3 tracks cm(−2) per kBq h m(−3); statistical analyses of results showed no significant effect from thoron concentration. The minimum and maximum detectable radon concentrations were 92 Bq m(−3) and 231 kBq m(−3) for a measurement period of three months, respectively. The air exchange rate was estimated to be 0.26 ± 0.16 h(−1), whose effect on the measured time-integrated radon concentration was small. These results indicate that the monitor could be used as a wearable monitor for radon measurements, especially in places where radon concentrations may be relatively high, such as mines and caves.
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spelling pubmed-74602002020-09-02 Passive-Type Radon Monitor Constructed Using a Small Container for Personal Dosimetry Tamakuma, Yuki Kranrod, Chutima Suzuki, Takahito Watanabe, Yuki Ploykrathok, Thamaborn Negami, Ryoju Nugraha, Eka Djatnika Iwaoka, Kazuki Janik, Mirosław Hosoda, Masahiro Tokonami, Shinji Int J Environ Res Public Health Article The International Commission on Radiological Protection (ICRP) recently recommended a new dose conversion factor for radon based on the latest epidemiological studies and dosimetric model. It is important to evaluate an inhalation dose from radon and its progeny. In the present study, a passive radon personal monitor was designed using a small container for storing contact lenses and its performance was evaluated. The conversion factor for radon ((222)Rn), the effect of thoron ((220)Rn) concentration and the air exchange rate were evaluated using the calibration chamber at Hirosaki University. The minimum and maximum detectable radon concentrations were calculated. The conversion factor was evaluated as 2.0 ± 0.3 tracks cm(−2) per kBq h m(−3); statistical analyses of results showed no significant effect from thoron concentration. The minimum and maximum detectable radon concentrations were 92 Bq m(−3) and 231 kBq m(−3) for a measurement period of three months, respectively. The air exchange rate was estimated to be 0.26 ± 0.16 h(−1), whose effect on the measured time-integrated radon concentration was small. These results indicate that the monitor could be used as a wearable monitor for radon measurements, especially in places where radon concentrations may be relatively high, such as mines and caves. MDPI 2020-08-05 2020-08 /pmc/articles/PMC7460200/ /pubmed/32764464 http://dx.doi.org/10.3390/ijerph17165660 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Tamakuma, Yuki
Kranrod, Chutima
Suzuki, Takahito
Watanabe, Yuki
Ploykrathok, Thamaborn
Negami, Ryoju
Nugraha, Eka Djatnika
Iwaoka, Kazuki
Janik, Mirosław
Hosoda, Masahiro
Tokonami, Shinji
Passive-Type Radon Monitor Constructed Using a Small Container for Personal Dosimetry
title Passive-Type Radon Monitor Constructed Using a Small Container for Personal Dosimetry
title_full Passive-Type Radon Monitor Constructed Using a Small Container for Personal Dosimetry
title_fullStr Passive-Type Radon Monitor Constructed Using a Small Container for Personal Dosimetry
title_full_unstemmed Passive-Type Radon Monitor Constructed Using a Small Container for Personal Dosimetry
title_short Passive-Type Radon Monitor Constructed Using a Small Container for Personal Dosimetry
title_sort passive-type radon monitor constructed using a small container for personal dosimetry
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7460200/
https://www.ncbi.nlm.nih.gov/pubmed/32764464
http://dx.doi.org/10.3390/ijerph17165660
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