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Author : Dan Foy Holleman
Publisher :
ISBN 13 :
Total Pages : 280 pages
Book Rating : 4.:/5 (643 download)
Download or read book Radiation Dosimetry for the Respiratory Tract of Uranium Miners written by Dan Foy Holleman and published by . This book was released on 1968 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 5 pages
Book Rating : 4.:/5 (925 download)
Download or read book Radiation Dosimetry for the Respiratory Tract for Uranium Miners written by and published by . This book was released on 1969 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Factors affecting the radiation dose to the respiratory tract of uranium miners were investigated. These included atmospheric constitution, deposition of radioactivity in the respiratory tract and physiological translocation. Several aspects of the uranium mine atmosphere were considered, such as radon and radon daughter activity concentrations, physical form and activity-size distribution of the radon daughters, relative humidity and air temperature. Activity concentrations were found to be extremely variable, however, the remaining atmospheric factors were reasonably stable. Less than ten percent of the radon daughters were unattached. The attached fraction could apparently be represented by a mean diffusion coefficient of 1.3 x 10−5 cm2/sec or an aerodynamic size of 0.067 microns. This diffusion coefficient was not significantly affected by the presence of atmospheric particles produced during normal mining operations. Total and regional deposition percentages were determined experimentally as well as theoretically. Percent total deposition values for individual radon daughters were 50, 45 and 41 for radium-A, radium-B and radium-C, respectively, for an average respiration rate of 18 min−1 and an average tidal volume of 1.2 liters. The influence of respiration rate and tidal volume upon total deposition was examined. Regional deposition fractions for the nasal cavity, tracheobronchial and pulmonary regions were 22, 15 and 63 percent of the total deposited activity, respectively, for nose-breathing. Physiological translocation of respiratory deposited activity was investigated for various regions of the respiratory system. Results indicated that ciliary translocation was of negligible importance in the dosimetry of inhaled radon daughters.
Author : Dan F. Holleman
Publisher :
ISBN 13 :
Total Pages : 140 pages
Book Rating : 4.:/5 (531 download)
Download or read book Radon Progeny Inhalation Study as Applicable to Uranium Mining Operations written by Dan F. Holleman and published by . This book was released on 1968 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Council on Radiation Protection and Measurements
Publisher : Ncrp
ISBN 13 :
Total Pages : 146 pages
Book Rating : 4.3/5 (91 download)
Download or read book Exposures from the Uranium Series with Emphasis on Radon and Its Daughters written by National Council on Radiation Protection and Measurements and published by Ncrp. This book was released on 1984 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309037891
Total Pages : 623 pages
Book Rating : 4.3/5 (9 download)
Download or read book Health Risks of Radon and Other Internally Deposited Alpha-Emitters written by National Research Council and published by National Academies Press. This book was released on 1988-02-01 with total page 623 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes hazards from radon progeny and other alpha-emitters that humans may inhale or ingest from their environment. In their analysis, the authors summarize in one document clinical and epidemiological evidence, the results of animal studies, research on alpha-particle damage at the cellular level, metabolic pathways for internal alpha-emitters, dosimetry and microdosimetry of radionuclides deposited in specific tissues, and the chemical toxicity of some low-specific-activity alpha-emitters. Techniques for estimating the risks to humans posed by radon and other internally deposited alpha-emitters are offered, along with a discussion of formulas, models, methods, and the level of uncertainty inherent in the risk estimates.
Author : National Council on Radiation Protection and Measurements
Publisher : Ncrp
ISBN 13 :
Total Pages : 594 pages
Book Rating : 4.F/5 ( download)
Download or read book Evaluation of Occupational and Environmental Exposures to Radon and Radon Daughters in the United States written by National Council on Radiation Protection and Measurements and published by Ncrp. This book was released on 1984 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : International Atomic Energy Agency
Publisher :
ISBN 13 : 9789201069191
Total Pages : 217 pages
Book Rating : 4.0/5 (691 download)
Download or read book Occupational Radiation Protection in the Uranium Mining and Processing Industry written by International Atomic Energy Agency and published by . This book was released on 2020-06-30 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Safety Report has been developed as part of the IAEA programme on occupational radiation protection to provide for the application of its safety standards in implementing a graded approach to the protection of workers against exposures associated with uranium mining and processing. The publication describes the methods of production associated with the uranium industry and provides practical information on the radiological risks to workers in the exploration, mining and processing of uranium. It is a compilation of detailed information on uranium mining and processing stages and techniques, general radiation protection considerations in the relevant industry, general methodology applicable for control, monitoring and dose assessment, exposure pathways, and radiation protection programs for the range of commonly used mining and processing techniques.
Author : United States. Bureau of Mines
Publisher :
ISBN 13 :
Total Pages : 119 pages
Book Rating : 4.:/5 (514 download)
Download or read book Radiation Dosimetry in Uranium Mines written by United States. Bureau of Mines and published by . This book was released on 1978 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : R. A. Guilmette
Publisher :
ISBN 13 :
Total Pages : 276 pages
Book Rating : 4.3/5 (91 download)
Download or read book Respiratory Tract Dosimetry written by R. A. Guilmette and published by . This book was released on 1991 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 3 pages
Book Rating : 4.:/5 (925 download)
Download or read book Respiratory Protection for Uranium Miners written by and published by . This book was released on 1969 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method of analyzing filter samples by alpha spectroscopy was developed for accurately determining the airborne concentrations of RaA, RaB, and RaC in atmospheres contaminated with radon. The method was used to determine the concentration of radon daughter products in a uranium mine atmosphere and to evaluate respiratory protective devices worn by miners. Measurements of the radon daughter activity deposited in the respiratory tract of person exposed to a representative mine atmosphere indicated average percent depositions of 50.7%, 43.9% and 41.4% for the RaA, RaB and RaC components. The fraction of the activity deposited depended on the properties of the aerosol inhaled and on the breathing pattern of the subject. Increased deposition was observed for large tidal volumes and low breathing rates. Several commercial and experimental respirator filters were tested for their ability to remove the radon daughter activity encountered in a mine atmosphere. High removal efficiencies were exhibited by densely packed fiber filters and by resin-impregnated wool filters. An in vivo counting system capable of detecting the RaC activity present in the respiratory tract of working miners was used to estimate the protection afforded by respirators under mining conditions. Protection factors of 5 to 10 were achieved by several commercial respirators.
Author : Panel on Dosimetric Assumptions Affecting the Application of Radon Risk Estimates
Publisher :
ISBN 13 :
Total Pages : 264 pages
Book Rating : 4.3/5 (91 download)
Download or read book Comparative Dosimetry of Radon in Mines and Homes written by Panel on Dosimetric Assumptions Affecting the Application of Radon Risk Estimates and published by . This book was released on 1991 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies of underground miners have provided a wealth of data about the risk of lung cancer from exposure to radon's progeny elements, but the application of the miner data to the home environment is not straightforward. In Comparative Dosimetry of Radon in Mines and Homes, an expert committee uses a new dosimetric model to extrapolate to the home environment the risk relationships found in the miner studies. Important new scaling factors are developed for applying risk estimates based on miner data to men, women, and children in domestic environments. The book includes discussions of radon dosimetry and the uncertainties concerning other risk factors such as age and smoking habits. The book also contains a thorough technical discussion of the characteristics of radioactive aerosols in domestic environments, the dose of inhaled radon progeny to different age groups, identification of respiratory tract cells at the greatest risk of carcinogenesis, and a complete description of the new lung dose model being developed by the International Commission on Radiological Protection as modified by this committee.
Author :
Publisher :
ISBN 13 :
Total Pages : 3 pages
Book Rating : 4.:/5 (925 download)
Download or read book Respiratory Protection for Uranium Miners written by and published by . This book was released on 1969 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method of analyzing filter samples by alpha spectroscopy was developed for accurately determining the airborne concentrations of RaA, RaB, and RaC in atmospheres contaminated with radon. The method was used to determine the concentration of radon daughter products in a uranium mine atmosphere and to evaluate respiratory protective devices worn by miners. Measurements of the radon daughter activity deposited in the respiratory tract of person exposed to a representative mine atmosphere indicated average percent depositions of 50.7%, 43.9% and 41.4% for the RaA, RaB and RaC components. The fraction of the activity deposited depended on the properties of the aerosol inhaled and on the breathing pattern of the subject. Increased deposition was observed for large tidal volumes and low breathing rates. Several commercial and experimental respirator filters were tested for their ability to remove the radon daughter activity encountered in a mine atmosphere. High removal efficiencies were exhibited by densely packed fiber filters and by resin-impregnated wool filters. An in vivo counting system capable of detecting the RaC activity present in the respiratory tract of working miners was used to estimate the protection afforded by respirators under mining conditions. Protection factors of 5 to 10 were achieved by several commercial respirators.
Author : United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR)
Publisher : United Nations
ISBN 13 : 9210600029
Total Pages : 512 pages
Book Rating : 4.2/5 (16 download)
Download or read book Sources, Effects and Risks of Ionizing Radiation, United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) 2016 Report written by United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) and published by United Nations. This book was released on 2017-04-25 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report assesses the levels and effects of exposure to ionizing radiation. Scientific findings underpin radiation risk evaluation and international protection standards. This report comprises a report with two underpinning scientific annexes. The first annex recapitulates and clarifies the philosophy of science as well as the scientific knowledge for attributing observed health effects in individuals and populations to radiation exposure, and distinguishes between that and inferring risk to individuals and populations from an exposure. The second annex reviews the latest thinking and approaches to quantifying the uncertainties in assessments of risk from radiation exposure, and illustrates these approaches with application to examples that are highly pertinent to radiation protection.
Author : W. J. Bair
Publisher :
ISBN 13 :
Total Pages : 116 pages
Book Rating : 4.3/5 (91 download)
Download or read book Radiobiology and Dosimetry of Inhaled Radionuclides written by W. J. Bair and published by . This book was released on 1995 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Howard E. Ayer
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.3/5 (91 download)
Download or read book Control of Radon and Its Daughters in Mines by Ventilation written by Howard E. Ayer and published by . This book was released on 1954 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. Congress. Joint Committee on Atomic Energy. Subcommittee on Research, Development, and Radiation
Publisher :
ISBN 13 :
Total Pages : 1454 pages
Book Rating : 4.:/5 (319 download)
Download or read book Radiation Exposure of Uranium Miners written by United States. Congress. Joint Committee on Atomic Energy. Subcommittee on Research, Development, and Radiation and published by . This book was released on 1967 with total page 1454 pages. Available in PDF, EPUB and Kindle. Book excerpt: Considers levels of radiation to which uranium miners are exposed, radiation monitoring standards, and health implications of uranium radiation exposure, including its possible relation to lung cancer.
Author :
Publisher :
ISBN 13 :
Total Pages : 700 pages
Book Rating : 4.0/5 ( download)
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1975 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
