A method for radiologically evaluating indoor use of dimension stone considering radon exhalation rates

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dc.contributor.authorEL HAJJ, THAMMIRIS M.pt_BR
dc.contributor.authorGANDOLLA, MAURO P.A.pt_BR
dc.contributor.authorSILVA, PAULO S.C. dapt_BR
dc.contributor.authorJULIÃO, EDUARDO L.pt_BR
dc.contributor.authorVILLANUEVA, JOSÉ-LUIZ G.pt_BR
dc.contributor.authorDELBONI JUNIOR, HOMEROpt_BR
dc.coverageInternacionalpt_BR
dc.date.accessioned2020-10-20T15:35:47Z
dc.date.available2020-10-20T15:35:47Z
dc.date.issued2020pt_BR
dc.description.abstractBackground: The use of natural radioactive building materials could be a health risk for both dwellers and mining workers. Therefore, a quick and effective method to test batches of rock samples is needed. Nevertheless, there is no reference value for maximum exhalation rates for building materials, except radiological hazard indices that do not measure gas exhalation rates directly. Objectives: This article investigated the correlations between Gamma Index and radon and thoron exhalation rates, and the proportions of radon and thoron in samples. Moreover, the main objectives were to analyze the feasibility of screening problematic samples for indoor use through a portable radiation detector (CoMo 170), which consists of a quick analysis at very low cost, and to simulate indoor concentration of radon using the measured exhalation rates of dimension stone slabs. Design: Best-selling dimension stone slabs were submitted to the following assays: gamma spectrometry, radon and thoron exhalation analysis using scintillation cell, and radioactivity measurement using a portable detector. Univariate and multivariate statistical analyses were conducted using Statistica 13 software. Results: The average activity concentrations measured were 971 ± 58.6 Bq/kg of 40K, 184 ± 9 Bq/kg of 232Th, and 74 ± 3 Bq/kg of 226Ra. The maximum activity concentrations of 40K, 232Th, and 226Ra series were 1,734 ± 100 Bq/kg, 2,667 ± 109 Bq/kg, and 596 ± 2 Bq/kg, respectively. The average exhalation rate of 222Rn was 406 ± 20 Bq/h m2. Conclusions: The main recommendations arising from this study are as follows: a portable radiation detector (CoMo 170) could be used as a screening method for selected samples; Gamma Index limit value = 1 for dimension stone slabs could be adopted when assessing radon and thoron exhalation; and the surface radon exhalation rate should be measured as a basis of recommendation for surface treatment before sales. Finally, thoron exhalations should be considered in radiological assessment, as 57% of the samples had higher thoron exhalation rates than radon.pt_BR
dc.format.extent1-15pt_BR
dc.identifier.citationEL HAJJ, THAMMIRIS M.; GANDOLLA, MAURO P.A.; SILVA, PAULO S.C. da; JULIÃO, EDUARDO L.; VILLANUEVA, JOSÉ-LUIZ G.; DELBONI JUNIOR, HOMERO. A method for radiologically evaluating indoor use of dimension stone considering radon exhalation rates. <b>Journal of the European Radon Association</b>, v. 1, p. 1-15, 2020. DOI: <a href="https://dx.doi.org/10.35815/radon.v1.3632">10.35815/radon.v1.3632</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/31463.
dc.identifier.doi10.35815/radon.v1.3632pt_BR
dc.identifier.issn2736-2272pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-9351-9201
dc.identifier.percentilfiSem Percentilpt_BR
dc.identifier.percentilfiCiteScoreSem Percentil CiteScore
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/31463
dc.identifier.vol1pt_BR
dc.relation.ispartofJournal of the European Radon Associationpt_BR
dc.rightsopenAccesspt_BR
dc.subjectconstruction
dc.subjectbuildings
dc.subjectbuilding materials
dc.subjectradioactive minerals
dc.subjectradon
dc.subjectradon 220
dc.subjectradiation protection
dc.subjectgamma radiation
dc.subjectnatural radioactivity
dc.subjectradiation doses
dc.subjectexhalation
dc.subjectregulations
dc.titleA method for radiologically evaluating indoor use of dimension stone considering radon exhalation ratespt_BR
dc.typeArtigo de periódicopt_BR
dspace.entity.typePublication
ipen.autorPAULO SERGIO CARDOSO DA SILVA
ipen.codigoautor2777
ipen.contributor.ipenauthorPAULO SERGIO CARDOSO DA SILVA
ipen.date.recebimento20-10
ipen.identifier.fiSem F.I.pt_BR
ipen.identifier.fiCiteScoreSem CiteScore
ipen.identifier.ipendoc27237pt_BR
ipen.type.genreArtigo
relation.isAuthorOfPublicationaa898df6-ea14-482c-bc29-b45954bb0542
relation.isAuthorOfPublication.latestForDiscoveryaa898df6-ea14-482c-bc29-b45954bb0542
sigepi.autor.atividadeSILVA, PAULO S.C. da:2777:320:Npt_BR
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