Indoor radon and thoron from building materials: Analysis of humidity, air exchange rate, and dose assessment
Building materials contribute significantly to the indoor radon and thoron levels. Therefore, parameters that influence the exhalation rates of radon and thoron from building material need to be analyzed closely. As a preliminary study, the effects of humidity on exhalation rates were measured using...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020-10-01
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| Series: | Nuclear Engineering and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573319309192 |
| _version_ | 1819319232141197312 |
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| author | Ahmad Ciptadi Syuryavin Seongjin Park Muttaqin Margo Nirwono Sang Hoon Lee |
| author_facet | Ahmad Ciptadi Syuryavin Seongjin Park Muttaqin Margo Nirwono Sang Hoon Lee |
| author_sort | Ahmad Ciptadi Syuryavin |
| collection | DOAJ |
| description | Building materials contribute significantly to the indoor radon and thoron levels. Therefore, parameters that influence the exhalation rates of radon and thoron from building material need to be analyzed closely. As a preliminary study, the effects of humidity on exhalation rates were measured using a system with an accumulation chamber and RAD7 detector for Korean brick, Korean soil, and Indonesian brick. Resulting doses to a person who resides in a room constructed from the building materials were assessed by UNSCEAR method for different air exchange rates. The measurements have revealed that Korean brick exhaled the highest radon and thoron while Indonesian brick exhaled the lowest thoron. Results showed that for a typical low dense material, radon and thoron exhalation rate will increase until reached its maximum at a certain value of humidity and will remain saturated above it. Analysis on concentration and effective dose showed that radon is strongly affected by air exchange rate (ACH). This is showed by about 66 times decrease of radon dose from 0.00 h−1 to those of 0.50 h−1 ACH and decrease by a factor of 2 from 0.50 h−1 to those of 0.80 h−1. In case of thoron, the ACH doesn't have significant effects on effective dose. |
| first_indexed | 2024-12-24T11:00:25Z |
| format | Article |
| id | doaj.art-dd46024d09d34eff9c0863ffe311243c |
| institution | Directory Open Access Journal |
| issn | 1738-5733 |
| language | English |
| last_indexed | 2024-12-24T11:00:25Z |
| publishDate | 2020-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj.art-dd46024d09d34eff9c0863ffe311243c2022-12-21T16:58:43ZengElsevierNuclear Engineering and Technology1738-57332020-10-01521023702378Indoor radon and thoron from building materials: Analysis of humidity, air exchange rate, and dose assessmentAhmad Ciptadi Syuryavin0Seongjin Park1Muttaqin Margo Nirwono2Sang Hoon Lee3School of Architectural, Civil Environmental and Energy Eng., Kyungpook National Univ., Daegu, 41566, Republic of Korea; Nuclear Energy Regulatory Agency, BAPETEN, Jl Gajah Mada 8, Jakarta, 10120, IndonesiaSchool of Architectural, Civil Environmental and Energy Eng., Kyungpook National Univ., Daegu, 41566, Republic of Korea; Corresponding author.School of Architectural, Civil Environmental and Energy Eng., Kyungpook National Univ., Daegu, 41566, Republic of Korea; Nuclear Energy Regulatory Agency, BAPETEN, Jl Gajah Mada 8, Jakarta, 10120, IndonesiaSchool of Architectural, Civil Environmental and Energy Eng., Kyungpook National Univ., Daegu, 41566, Republic of Korea; Radiation Science Research Institute (RSRI), Daehak ro 80, Bukgu, Daegu, 41566, Republic of KoreaBuilding materials contribute significantly to the indoor radon and thoron levels. Therefore, parameters that influence the exhalation rates of radon and thoron from building material need to be analyzed closely. As a preliminary study, the effects of humidity on exhalation rates were measured using a system with an accumulation chamber and RAD7 detector for Korean brick, Korean soil, and Indonesian brick. Resulting doses to a person who resides in a room constructed from the building materials were assessed by UNSCEAR method for different air exchange rates. The measurements have revealed that Korean brick exhaled the highest radon and thoron while Indonesian brick exhaled the lowest thoron. Results showed that for a typical low dense material, radon and thoron exhalation rate will increase until reached its maximum at a certain value of humidity and will remain saturated above it. Analysis on concentration and effective dose showed that radon is strongly affected by air exchange rate (ACH). This is showed by about 66 times decrease of radon dose from 0.00 h−1 to those of 0.50 h−1 ACH and decrease by a factor of 2 from 0.50 h−1 to those of 0.80 h−1. In case of thoron, the ACH doesn't have significant effects on effective dose.http://www.sciencedirect.com/science/article/pii/S1738573319309192Natural radioactivityIndoor environmentRadon-thoron exhalation rateBuilding materialRadiological risk |
| spellingShingle | Ahmad Ciptadi Syuryavin Seongjin Park Muttaqin Margo Nirwono Sang Hoon Lee Indoor radon and thoron from building materials: Analysis of humidity, air exchange rate, and dose assessment Nuclear Engineering and Technology Natural radioactivity Indoor environment Radon-thoron exhalation rate Building material Radiological risk |
| title | Indoor radon and thoron from building materials: Analysis of humidity, air exchange rate, and dose assessment |
| title_full | Indoor radon and thoron from building materials: Analysis of humidity, air exchange rate, and dose assessment |
| title_fullStr | Indoor radon and thoron from building materials: Analysis of humidity, air exchange rate, and dose assessment |
| title_full_unstemmed | Indoor radon and thoron from building materials: Analysis of humidity, air exchange rate, and dose assessment |
| title_short | Indoor radon and thoron from building materials: Analysis of humidity, air exchange rate, and dose assessment |
| title_sort | indoor radon and thoron from building materials analysis of humidity air exchange rate and dose assessment |
| topic | Natural radioactivity Indoor environment Radon-thoron exhalation rate Building material Radiological risk |
| url | http://www.sciencedirect.com/science/article/pii/S1738573319309192 |
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