natural radioactivity of granites used as building materials in iran
Authors
abstract
the radionuclides 226ra, 232th and 40k concentrations measured as well as radiological parameters, for 14 granite samples that use in iran as building material were calculated. the measurements of the radioactivity concentrations were carried out at nuclear physics laboratory university of tabriz. this subject is important in environmental radiological protection, since granites are extensively used as building and ornamental stones. the external and internal hazard index and the annual effective dose rates index evaluated and compared to the limits proposed by united nation scientific committee on the effects of atomic radiation. radiation exposure dose rate and radium equivalent activity raeq for all samples under investigation were calculated. radium-equivalent activities (raeq) range from 210.50-450.72 bq/kg. in addition internal hazard index (hin) and external hazard index for evaluation of environmental risk have also been determined which range 0.81-1.63 and 0.57-1.22 respectively. recommended values for internal and external hazard index are 1.5 and 1 respectively. the annual effective doses of studied samples is calculated based on equations and conversion coefficient proposed by unscear which is 1.05 for one sample and ranges from 0.3 – 1 svg/y for other studied samples. according to european commission (ec, 1999), effective doses exceeding the dose criterion of 1 msv/y should be taken into account in terms of radiation protection.
similar resources
Natural radioactivity in raw materials used in building industry in Serbia
Natural radioactivity is responsible for most of the total radiation dose received by human population. Geological materials used in building industry usually become contaminated with naturally occurring radioactive materials. They are used as mixtures in building industry (kaolin, zircon, frit, feldspar) or mechanically processed and used for covering floors and walls of the rooms (granite). I...
full textNatural radioactivity of some Egyptian materials used in glasses manufacturing and glass ceramics
Background: The new glasses from harmful environmental waste such as cement dust; limestone phosphate, sand and borax (Genkare) were manufactured. Investigation of the radioactivity present in these materials (Phosphate rock, cement dust, limestone, sand and borax) enables one to assess any possible radiological hazard to humankind by such materials. Materials and Methods: Fifteen samples were ...
full textNatural radioactivity concentration in raw materials used for manufacturing refractory products
Background: Some Particular areas contain natural radionuclide at levels much higher than those usually present in earth's crust. The radiological impact of the use of zirconium ore in zirconium industry is due to internal exposure of the lung by alpha particles and external exposure of the body by the gamma rays. The result of gamma spectrometry measurement of the concentrations of th...
full textAssessment of Natural Radioactivity and Associated Radiation Hazards in Some Building Materials Used in Kilpenathur, Tiruvannamalai Dist, Tamilnadu, India
The present study aimed to measure the activity concentration of natural radionuclides in the locally used building materials from Kilpenthaur, Tiruvannmalai Dist, Tamilnadu, India was investigated with an aim of evaluating the radiation hazard arising due to the use of these materials in the construction of dwellings. The concentrations of natural radionuclides Ra, Th and K in four types of bu...
full textAssessment of Natural Radioactivity Levels and Potential Radiological Risks of Common Building Materials Used in Bangladeshi Dwellings
The concentrations of primordial radionuclides (226Ra, 232Th and 40K) in commonly used building materials (brick, cement and sand), the raw materials of cement and the by-products of coal-fired power plants (fly ash) collected from various manufacturers and suppliers in Bangladesh were determined via gamma-ray spectrometry using an HPGe detector. The results showed that the mean concentrations ...
full textAssessment of natural radioactivity in various commercial tiles used for building purposes in Nigeria
In this study, we evaluated the activity concentration of natural radionuclides (226Ra, 232Th and 40K) for fifteen (15) different brands of tile samples used for building purposes in Nigeria. The tile samples were analyzed using High purity Germanium gamma detector. The mean activity concentrations of 226Ra, 232Th, and 40K were observed to be 61.1 ± 5.5 Bq/kg, 70.2 ± 6.08 Bq/kg and 514.7 ± 59.8...
full textMy Resources
Save resource for easier access later
Journal title:
محیط شناسیجلد ۳۶، شماره ۵۶، صفحات ۰-۰
Keywords
Hosted on Doprax cloud platform doprax.com
copyright © 2015-2023