Dose rates evaluation of some granitic rocks from the Paran?? state

dc.creatorFERREIRA, A.O.
dc.creatorPECEQUILO, B.R.S.
dc.date2021
dc.date2021-08-02T16:22:58Z
dc.date2021-08-02T16:22:58Z
dc.date.accessioned2023-09-28T14:18:47Z
dc.date.available2023-09-28T14:18:47Z
dc.identifier2319-0612
dc.identifierhttp://repositorio.ipen.br/handle/123456789/32079
dc.identifier1A
dc.identifier9
dc.identifier10.15392/bjrs.v9i1A.1242
dc.identifier0000-0001-5641-1165
dc.identifierSem Percentil
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/9002302
dc.descriptionGranitic rocks, widely used as building materials, are known to contain natural radionuclides and can be an important source of radiation for the population. Thirty-four samples of granite rocks from geological occurrences in Paran?? state were measured with detector for evaluation of 226Ra, 232Th and 40K activity concentrations. The effective annual external dose was evaluated from these radionuclides activities using a dosimetric room model with dimensions 4 m x 5 m x 2.8 m in which all walls are internally coated with 2 cm thickness granites and considering the annual exposure time of 7000 h, suggested by the European Commission on Radiological Protection for superficial coating materials. The internal exposure was evaluated from radon air concentration of the model room, simulated from an exhalation rate of 222Rn, determined with CR-39 solid state nuclear track detectors by the sealed can technique, considering a ventilation rate of 0.5 h-1 and the same annual exposure time of 7000 h. The results for external gamma rays showed an increase in the annual effective dose ranging from 96 ?? 4 ??Sv.a-1 to 223 ?? 7 ??Sv.a-1 and, for radon inhalation, an increase in the ranging from 0.4 ?? 0.04 ??Sv.a-1 to 70 ?? 4 ??Sv.a-1. All results stayed below the recommended value by the European Commission on Radiological Protection, of 1 mSv.a-1.
dc.format1-11
dc.relationBrazilian Journal of Radiation Sciences
dc.rightsopenAccess
dc.sourceMeeting on Nuclear Applications (ENAN), 14th, October 21-25, 2019, Santos, SP
dc.subjectbuilding materials
dc.subjectenvironmental effects
dc.subjecthigh-purity ge detectors
dc.subjectinhalation
dc.subjectpotassium 40
dc.subjectradiation doses
dc.subjectradiation protection
dc.subjectradium 226
dc.subjectradon 222
dc.subjectthorium 232
dc.titleDose rates evaluation of some granitic rocks from the Paran?? state
dc.typeArtigo de peri??dico
dc.coverageN


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