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Measurements and computational fluid dynamics investigation of the indoor radon distribution in a typical naturally ventilated room
Based on the European Union Basic Safety Standards to protect people against exposure to ionizing radiation, establishing and addressing the reference levels for indoor radon concentrations is necessary. Therefore, the indoor radon concentration should be monitored and control in dwelling and workpl...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9899222/ https://www.ncbi.nlm.nih.gov/pubmed/36739299 http://dx.doi.org/10.1038/s41598-022-23642-7 |
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author | Adelikhah, Mohammademad Imani, Morteza Kovács, Tibor |
author_facet | Adelikhah, Mohammademad Imani, Morteza Kovács, Tibor |
author_sort | Adelikhah, Mohammademad |
collection | PubMed |
description | Based on the European Union Basic Safety Standards to protect people against exposure to ionizing radiation, establishing and addressing the reference levels for indoor radon concentrations is necessary. Therefore, the indoor radon concentration should be monitored and control in dwelling and workplaces. However, proper ventilation and sustainability are the major factors that influence how healthy the environment in a building is for its occupants. In this paper, the indoor radon distribution in a typical naturally ventilated room under two scenarios (when the door is closed and open) using the computational fluid dynamics (CFD) technique was studied. The CFD code ANSYS Fluent 2020 R1 based on the finite volume method was employed before the simulation results were compared with analytical calculations as well as passive and active measurements. The average radon concentration from the CFD simulation was found to be between 70.21 and 66.25 Bq m(−3) under closed and open-door conditions, respectively, at the desired ventilation rate of 1 ACH (Air Changes per Hour). Moreover, the highest concentrations of radon were measured close to the floor and the lowest values were recorded near to the inlet, resulting in the airflow velocity profile. The simulation results were in good agreement with the maxima of 19% and 7% compared to analytical calculations at different indoor air velocities in the open- and closed-door scenarios, respectively. The measured radon concentrations obtained by the active measurements also fitted well with the CFD results, for example, with a relative standard deviation of around 7% and 2% when measured by AlphaGUARD and RAD7 monitors at a height of 1.0 m above the ground in the open-door scenario. From the simulation results, the effective dose received by an individual from the indoor air of the workplace was also calculated. |
format | Online Article Text |
id | pubmed-9899222 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-98992222023-02-06 Measurements and computational fluid dynamics investigation of the indoor radon distribution in a typical naturally ventilated room Adelikhah, Mohammademad Imani, Morteza Kovács, Tibor Sci Rep Article Based on the European Union Basic Safety Standards to protect people against exposure to ionizing radiation, establishing and addressing the reference levels for indoor radon concentrations is necessary. Therefore, the indoor radon concentration should be monitored and control in dwelling and workplaces. However, proper ventilation and sustainability are the major factors that influence how healthy the environment in a building is for its occupants. In this paper, the indoor radon distribution in a typical naturally ventilated room under two scenarios (when the door is closed and open) using the computational fluid dynamics (CFD) technique was studied. The CFD code ANSYS Fluent 2020 R1 based on the finite volume method was employed before the simulation results were compared with analytical calculations as well as passive and active measurements. The average radon concentration from the CFD simulation was found to be between 70.21 and 66.25 Bq m(−3) under closed and open-door conditions, respectively, at the desired ventilation rate of 1 ACH (Air Changes per Hour). Moreover, the highest concentrations of radon were measured close to the floor and the lowest values were recorded near to the inlet, resulting in the airflow velocity profile. The simulation results were in good agreement with the maxima of 19% and 7% compared to analytical calculations at different indoor air velocities in the open- and closed-door scenarios, respectively. The measured radon concentrations obtained by the active measurements also fitted well with the CFD results, for example, with a relative standard deviation of around 7% and 2% when measured by AlphaGUARD and RAD7 monitors at a height of 1.0 m above the ground in the open-door scenario. From the simulation results, the effective dose received by an individual from the indoor air of the workplace was also calculated. Nature Publishing Group UK 2023-02-04 /pmc/articles/PMC9899222/ /pubmed/36739299 http://dx.doi.org/10.1038/s41598-022-23642-7 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Adelikhah, Mohammademad Imani, Morteza Kovács, Tibor Measurements and computational fluid dynamics investigation of the indoor radon distribution in a typical naturally ventilated room |
title | Measurements and computational fluid dynamics investigation of the indoor radon distribution in a typical naturally ventilated room |
title_full | Measurements and computational fluid dynamics investigation of the indoor radon distribution in a typical naturally ventilated room |
title_fullStr | Measurements and computational fluid dynamics investigation of the indoor radon distribution in a typical naturally ventilated room |
title_full_unstemmed | Measurements and computational fluid dynamics investigation of the indoor radon distribution in a typical naturally ventilated room |
title_short | Measurements and computational fluid dynamics investigation of the indoor radon distribution in a typical naturally ventilated room |
title_sort | measurements and computational fluid dynamics investigation of the indoor radon distribution in a typical naturally ventilated room |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9899222/ https://www.ncbi.nlm.nih.gov/pubmed/36739299 http://dx.doi.org/10.1038/s41598-022-23642-7 |
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