Dosimetric evaluation of individuals to 238U series, 232Th series and 40K radionuclides present in Brazilian ornamental rocks using computational simulation

dc.creatorPEREIRA, MARCO A.M.
dc.creatorSILVEIRA, LUCAS M.
dc.creatorNANNINI, FELIX
dc.creatorNEVES, LUCIO P.
dc.creatorPERINI, ANA P.
dc.creatorSANTOS, CARLA J.
dc.creatorBELINATO, WALMIR
dc.creatorSANTOS, WILLIAM S.
dc.date2019
dc.date2019-12-03T18:11:39Z
dc.date2019-12-03T18:11:39Z
dc.date.accessioned2023-09-28T14:12:41Z
dc.date.available2023-09-28T14:12:41Z
dc.identifier0147-6513
dc.identifierhttp://repositorio.ipen.br/handle/123456789/30408
dc.identifier173
dc.identifier10.1016/j.ecoenv.2019.02.038
dc.identifier86.086
dc.identifier85.33
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/9000637
dc.descriptionGranites are widely used in construction and they may be potential sources of ionizing radiation, due to the presence of radionuclides such as 40K and decay products from 238U series and 232Th series. These radionuclides occur in the minerals constituting the rocks. To evaluate the doses in humans exposed to 40K, and decay products from 238U series and 232Th series radiation, a room with dimensions of 4.0 ?? 5.0 ?? 2.8m3, with uniformly distributed radiation source on the floor of granitic rocks, was computationally modeled. Adult individuals were represented in the virtual scenario by two virtual anthropomorphic phantoms FASH3 and MASH3, incorporated simultaneously in the software MCNPX 2.7.0. The mean energy deposited on each organ and tissue of FASH3 and MASH3 phantoms was determined using the MCNPX F6 tally (MeV/g/particle), while the photon flux within the room was calculated with the MCNPX F4 tally (MeV/cm2/particle). The organs that obtained the highest conversion coefficients CC[HT] (Sv/Gy) were the red bone marrow (0.94), skin (0.90), breast (0.81) and bladder (0.73) for the FASH3; skin (0.89), gonads (0.88), breast (0.79) and bladder (0.70) for the MASH3. The simulated air absorbed dose rates varied between 23.4 (11%) and 25.8 (12%) nGy/h, and the annual dose rates were 0.10 (6%) and 0.11 (6%) mSv/year. These results presented acceptable statistical uncertainties and they are in agreement with the literature. Fluency of photons pointed to the central region of the room floor as the place of greatest exposure. The results showed that the organs closer to the radiation source had the highest deposited energy values. Based on the annual effective dose data obtained, it was possible to note that the values are within the literature. We believe that the methodology used will allow the investigation of any ornamental material that emits natural radiation.
dc.descriptionFunda????o de Amparo ?? Pesquisa do Estado de Minas Gerais (FAPEMIG)
dc.descriptionConselho Nacional de Desenvolvimento Cient??fico e Tecnol??gico (CNPq)
dc.descriptionFAPEMIG: APQ-03049-15; APQ-02934-15
dc.descriptionCNPq: 421603/2016-0; 420699/2016-3; 153177/2018-7
dc.format401-410
dc.relationEcotoxicology and Environmental Safety
dc.rightsopenAccess
dc.subjectrocks
dc.subjectgranites
dc.subjectionization
dc.subjectionizing radiations
dc.subjectcomputerized simulation
dc.subjectnatural radioactivity
dc.subjectdosimetry
dc.subjectmonte carlo method
dc.subjectphantoms
dc.subjectradioisotopes
dc.subjecturanium 238
dc.subjectthorium 232
dc.subjectpotassium 40
dc.subjectbrazil
dc.titleDosimetric evaluation of individuals to 238U series, 232Th series and 40K radionuclides present in Brazilian ornamental rocks using computational simulation
dc.typeArtigo de peri??dico
dc.coverageI


Este ítem pertenece a la siguiente institución