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Computational dose evaluation on children exposed to natural radioactivity from granitic rocks used as architectural materials.
Santos, William S; Pereira Neves, Lucio; Belinato, Walmir; Soares, Maria R; Valença, João V B; Perini, Ana P.
Afiliação
  • Santos WS; Physics Institute, Federal University of Uberlândia (INFIS/UFU), Uberlândia, MG, Brazil.
  • Pereira Neves L; Physics Institute, Federal University of Uberlândia (INFIS/UFU), Uberlândia, MG, Brazil.
  • Belinato W; Graduate Program in Biomedical Engineering (PPGEB/UFU), Electrical Engineering Faculty, Federal University of Uberlândia, Uberlândia, MG, Brazil.
  • Soares MR; Federal Institute of Bahia (IFBA), Vitória da Conquista, BA, Brazil.
  • Valença JVB; Federal University of Rondônia (UNIR), Rondônia, RO, Brazil.
  • Perini AP; Federal University of Health Sciences of Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil.
J Radiol Prot ; 42(1)2022 Jan 18.
Article em En | MEDLINE | ID: mdl-34736232
Considering the higher radiosensitivity of children in comparison to adults, studies related to children's exposure to ionising radiation have been long considered of relevance. For this study, the MCNPX2.7.0 Monte Carlo code and four paediatric voxel computational anthropomorphic phantoms, of both genders and aged 5 and 10 years, were used to simulate scenarios, where children are exposed to natural radiation emitted by sources in the ground by radionuclides of40K and of232Th and238U radioactive series. These elements are part of the composition of ten different types of ornamental rocks obtained from three regions of Brazil, and used as architectural material for flooring of houses. The virtual paediatric anthropomorphic phantoms were positioned in a room with dimensions of (4.0 × 5.0 × 2.8) m3filled with atmospheric air and a 3 cm thick granitic floor acting as a uniformly distributed planar gamma radiation source. The walls of the room were composed of 20 cm thick concrete. Gonads, bone marrow, bladder, colon, and skin were found to be the organs which receive the highest doses. The mean values of effective dose per air kerma at 1 m above the ground summed for all three radionuclides, were 0.96 and 0.68 Sv Gy-1for the 5 and 10 year old phantoms, respectively. The obtained results showed that the granitic rocks considered implicate annual effective doses which are 69%-78% lower than the annual limits, recommended by ICRP Publication 103.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Radioatividade / Poluentes Radioativos do Ar Tipo de estudo: Health_economic_evaluation Limite: Adult / Child / Child, preschool / Female / Humans / Male Idioma: En Revista: J Radiol Prot Assunto da revista: RADIOLOGIA Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido
Texto completo
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XML
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Radioatividade / Poluentes Radioativos do Ar Tipo de estudo: Health_economic_evaluation Limite: Adult / Child / Child, preschool / Female / Humans / Male Idioma: En Revista: J Radiol Prot Assunto da revista: RADIOLOGIA Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido