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ISBN 13 :
Total Pages : 68 pages
Book Rating : 4.:/5 (359 download)
Download or read book Sampling of Technetium-99 in Vegetation and Soils in the Vicinity of Operating Gaseous Diffusion Facilities written by and published by . This book was released on 1980 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Oak Ridge National Laboratory
Publisher :
ISBN 13 :
Total Pages : 51 pages
Book Rating : 4.:/5 (13 download)
Download or read book SAMPLING OF TECHNETIUM-99 IN VEGETATION AND SOILS IN THE VICINITY OF OPERATING GASEOUS DIFFUSION FACILITIES. written by Oak Ridge National Laboratory and published by . This book was released on 1980 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sampling of Technetium-99 in Vegetation and Soils in the Vicinity of Operating Gaseous Facilities. Environmental Sciences Division Publication written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Technetium-99 was measured in vegetation and soils collected near three operating gaseous diffusion facilities to obtain estimates of the soil-to-vegetation concentration factor. Analyses were performed primarily using radiochemical separations and low-level beta counting techniques with selected samples checked by isotope dilution mass spectroscopy. The concentration factor pooled from all three facilities appeared to be lognormally distributed with a geometric mean of 9.5 and a geometric standard deviation of 2.4. These values are comparable to calculated equilibrium concentration factors derived from other field experiments in which concentrations in soil and vegetation were observed to decrease with time subsequent to a single application of/sup 95m/TcO4−. These field values are one to two orders of magnitude less than concentration factors derived from laboratory experiments using potted plants. It is suggested that the radiologic significance of 99Tc in terrestrial food chains of importance to humans may be substantially lower than indicated by the simple difference between laboratory and field concentration factors if the time dependence of technetium activity in vegetation and soil is taken into consideration in radiological assessment models.
Author : G. Desmet
Publisher : Springer Science & Business Media
ISBN 13 : 9400941897
Total Pages : 416 pages
Book Rating : 4.4/5 (9 download)
Download or read book Technetium in the Environment written by G. Desmet and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the discovery of technetium (in 1937, by Perrier and Segre), technetium-99 and technetium-99m have become most familiar in the specialised literature, the behaviour of the former being of concern regarding its health impact, the latter having been used intensively in medical tests for many years. The knowledge of the characteristics and behaviour of this element in nature is currently increasing exponentially. It has become clear, however, that there is still a serious shortage of information needed to assess properly its burden and impact on man and his environment. Technetium may indeed be released from nuclear installations or as a waste product from medical applications. It is generally considered to be highly mobile as the anion TcOi, but it is also suspected to be readily reduced in soils and metabolised in living beings into lower oxidation states. The seminar was planned to analyse thoroughly the experimental results obtained up to now and to make recommendations of specific issues requiring further research. This book presents the papers of the different sessions in the order of presentation, and the conclusions drawn by three discussion groups which dealt separately with: problems of sources and distribution of man-made technetium and its radiological consequences; the chemical behaviour of technetium in different ecosystems; biochemical reactions and binding with macromolecules in various life systems. vi Preface The editors, together with the Programme Committee of the Seminar, wish to express their gratitude to the chairmen of the different sessions for their summary of the group discussions.
Author : Frank Owen Hoffman
Publisher :
ISBN 13 :
Total Pages : 116 pages
Book Rating : 4.:/5 (359 download)
Download or read book Environmental Behavior of Technetium in Soil and Vegetation written by Frank Owen Hoffman and published by . This book was released on 1982 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Behavior of Technetium in Soil and Vegetation written by and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Significant radiological exposures have been estimated for hypothetical atmospheric releases of Tc-99 from gaseous diffusion facilities when vegetation-to-soil concentration ratios representative of laboratory experiments are substituted for generic default values assumed in current regulatory models. To test the relevancy of these laboratory ratios, field investigations were conducted to obtain measurements of the vegetation-to-soil concentration ratio for Tc-99 in samples collected near operating gaseous diffusion facilities and to observe the dynamic behavior of technetium in soil and vegetation following a single application of a sprayed solution of /sup 95m/TcO4− Comparison of observed field concentration ratios and calculated steady-state concentration ratios with ratios obtained from previous laboratory experiments indicates that concentration ratios obtained from field data are one to two orders of magnitude less than those obtained from the laboratory. Furthermore, a substantial accumulation of technetium in soil and vegetation may not occur over long periods of time, since concentrations of technetium in both environmental media were observed to decrease with time subsequent to initial application of /sup 95m/TcO4−.
Author :
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ISBN 13 :
Total Pages : 508 pages
Book Rating : 4.:/5 (3 download)
Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Oak Ridge National Laboratory. Analytical Chemistry Division
Publisher :
ISBN 13 :
Total Pages : 174 pages
Book Rating : 4.3/5 (91 download)
Download or read book Analytical Chemistry Division Annual Progress Report for Period Ending ... written by Oak Ridge National Laboratory. Analytical Chemistry Division and published by . This book was released on 1980-12-31 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sampling of Technetium-99 in Vegetation and Soils .... written by and published by . This book was released on 19?? with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 116 pages
Book Rating : 4.3/5 (91 download)
Download or read book Health and Safety Research Division Progress Report for the Period ... written by and published by . This book was released on 1979-10 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John T. Lett
Publisher : Academic Press
ISBN 13 : 1483281884
Total Pages : 425 pages
Book Rating : 4.4/5 (832 download)
Download or read book Advances in Radiation Biology written by John T. Lett and published by Academic Press. This book was released on 2013-10-22 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Radiation Biology, Volume 10, provides an overview of the state of knowledge in the field of radiation biology. The book contains seven chapters and opens with a study on DNA repair phenomena that have been explored through the use of viruses as probes. This is followed by separate chapters on the behavior of the long-lived synthetic elements and their natural analogs in food chains; the physical and clinical basis for the use of ultrasound to induce local hyperthermia in human tumors; and the role of pH changes in the etiology of thermal cell killing and the potential of low pH as an adjuvant to hyperthermia. Subsequent chapters deal with the effects of accelerated heavy charged particles on various normal tissue systems; the effect of ionizing radiations on connective tissue; and solid tumor response to combined radiotherapy and chemotherapy.
Author : United States. Congress. House. Committee on Commerce. Subcommittee on Oversight and Investigations
Publisher :
ISBN 13 :
Total Pages : 500 pages
Book Rating : 4.0/5 ( download)
Download or read book The Paducah Gaseous Diffusion Plant written by United States. Congress. House. Committee on Commerce. Subcommittee on Oversight and Investigations and published by . This book was released on 2000 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : International Atomic Energy Agency
Publisher :
ISBN 13 :
Total Pages : 112 pages
Book Rating : 4.F/5 ( download)
Download or read book Generic Models and Parameters for Assessing the Environmental Transfer of Radionuclides from Routine Releases written by International Atomic Energy Agency and published by . This book was released on 1982 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 260 pages
Book Rating : 4.3/5 ( download)
Download or read book Oak Ridge Health Studies Phase 1 Report: Dose reconstruction feasibility study. pt. A. Tasks 1 & 2. A summary of historial activities on the Oak Ridge Reservation with emphasis on information concerning off-site emissions of hazardous materials. pt. B. Tasks 3 & 4. Identification of important environmental pathways for materials released from the Oak Ridge Reservation. pt. C. Task 5. A summary of information concerning historical locations and activities of populations potentially affected by releases from the Oak Ridge Reservation. pt. D. Task 6. Hazard summaries for important materials at the Oak Ridge Reservation written by and published by . This book was released on 1993 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : U.S. Nuclear Regulatory Commission
Publisher :
ISBN 13 :
Total Pages : 908 pages
Book Rating : 4.3/5 (91 download)
Download or read book Radioactive Waste Processing and Disposal written by U.S. Nuclear Regulatory Commission and published by . This book was released on 1980 with total page 908 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Commission of the European Communities
Publisher : Vienna : International Atomic Energy Agency
ISBN 13 :
Total Pages : 856 pages
Book Rating : 4.3/5 (91 download)
Download or read book Environmental Migration of Long-lived Radionuclides written by Commission of the European Communities and published by Vienna : International Atomic Energy Agency. This book was released on 1982 with total page 856 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : International Atomic Energy Agency
Publisher :
ISBN 13 :
Total Pages : 120 pages
Book Rating : 4.:/5 (2 download)
Download or read book Safety Series written by International Atomic Energy Agency and published by . This book was released on 1982 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
