Assessing the radon activity that exhales from building structures is crucial to identify the best strategies to prevent radon from entering a building or reducing its concentration in the inhabited spaces. The direct measurement is extremely difficult, so the common approach has consisted in developing models describing the radon migration and exhalation phenomena for building porous materials. However, due to the mathematical complexity of comprehensively modelling the radon transport phenomenon in buildings, simplified equations have been mostly adopted until now to assess the radon exhalation. A systematic analysis of the models applicable to radon transport has been carried out and it has resulted in four models differing in the migration mechanisms – only diffusive or diffusive and advective – and the presence of inner radon generation. The general solutions have been obtained for all the models. Moreover, three case-specific sets of boundary conditions have been formulated to account for all the actual scenarios occurring in buildings: both perimetral and partition walls and building structures in direct contact with soil or embankments. The corresponding case-specific solutions obtained serve as a key practical tool to improve the accuracy in assessing the contribution of building materials to indoor radon concentration according to the site-specific installation conditions in addition to the material inner properties.

Models of radon exhalation from building structures: General and case-specific solutions / Di Carlo, C.; Maiorana, A.; Ampollini, M.; Antignani, S.; Caprio, M.; Carpentieri, C.; Bochicchio, F.. - In: SCIENCE OF THE TOTAL ENVIRONMENT. - ISSN 0048-9697. - 885:(2023), pp. 1-13. [10.1016/j.scitotenv.2023.163800]

Models of radon exhalation from building structures: General and case-specific solutions.

A. Maiorana;
2023

Abstract

Assessing the radon activity that exhales from building structures is crucial to identify the best strategies to prevent radon from entering a building or reducing its concentration in the inhabited spaces. The direct measurement is extremely difficult, so the common approach has consisted in developing models describing the radon migration and exhalation phenomena for building porous materials. However, due to the mathematical complexity of comprehensively modelling the radon transport phenomenon in buildings, simplified equations have been mostly adopted until now to assess the radon exhalation. A systematic analysis of the models applicable to radon transport has been carried out and it has resulted in four models differing in the migration mechanisms – only diffusive or diffusive and advective – and the presence of inner radon generation. The general solutions have been obtained for all the models. Moreover, three case-specific sets of boundary conditions have been formulated to account for all the actual scenarios occurring in buildings: both perimetral and partition walls and building structures in direct contact with soil or embankments. The corresponding case-specific solutions obtained serve as a key practical tool to improve the accuracy in assessing the contribution of building materials to indoor radon concentration according to the site-specific installation conditions in addition to the material inner properties.
2023
radon transport; radon exhalation; building materials; natural radioactivity; indoor air
01 Pubblicazione su rivista::01a Articolo in rivista
Models of radon exhalation from building structures: General and case-specific solutions / Di Carlo, C.; Maiorana, A.; Ampollini, M.; Antignani, S.; Caprio, M.; Carpentieri, C.; Bochicchio, F.. - In: SCIENCE OF THE TOTAL ENVIRONMENT. - ISSN 0048-9697. - 885:(2023), pp. 1-13. [10.1016/j.scitotenv.2023.163800]
File allegati a questo prodotto
File Dimensione Formato  
DiCarlo_Models_2023.pdf

accesso aperto

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Creative commons
Dimensione 1.97 MB
Formato Adobe PDF
1.97 MB Adobe PDF

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1679325
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 2
  • ???jsp.display-item.citation.isi??? 1
social impact