title: Occupational exposure due to naturally occurring radionuclide material in granite quarry industry.
abstract: The potential occupational exposure in granite quarry industry due to the presence of naturally occurring radioactive material (NORM) has been investigated. The activity concentrations of (40)K, (226)Ra and (232)Th were determined using gamma-ray spectroscopy method. The annual effective dose of workers through different exposure pathways was determined by model calculations. The total annual effective dose varied from 21.48 to 33.69 μSv y(-1). Inhalation dose contributes the highest to the total effective dose. The results obtained were much lower than the intervention exemption levels (1.0 mSv y(-1)) given in the International Commission on Radiological Protection Publication 82.
authors: Department of Physics, University of Ibadan, Ibadan, Nigeria. jaaademola@yahoo.com
authors: J A
authors: JA
authors: Ademola
mesh_terms: D000396:Air Pollutants, Radioactive / Q000032:analysis*; D001417:Background Radiation; D006801:Humans; D007221:Industry; D016273:Occupational Exposure / Q000032:analysis* / Q000517:prevention & control; D011197:Potassium Radioisotopes / Q000032:analysis; D011834:Radiation Monitoring; D011883:Radium / Q000032:analysis; D012822:Silicon Dioxide / Q000737:chemistry*; D013910:Thorium / Q000032:analysis
chemical_list: D000396:Air Pollutants, Radioactive; D011197:Potassium Radioisotopes; C007886:granite; D013910:Thorium; D012822:Silicon Dioxide; D011883:Radium