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Author :
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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:
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 : 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:
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ISBN 13 :
Total Pages : 316 pages
Book Rating : 4.:/5 (3 download)
Download or read book Energy Research Abstracts written by and published by . This book was released on 1982 with total page 316 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 : 716 pages
Book Rating : 4.:/5 (319 download)
Download or read book INIS Atomindex written by and published by . This book was released on 1981 with total page 716 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 : 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:
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ISBN 13 :
Total Pages : 1010 pages
Book Rating : 4.3/5 (91 download)
Download or read book Government Reports Annual Index written by and published by . This book was released on 1982 with total page 1010 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Author :
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ISBN 13 :
Total Pages : 1262 pages
Book Rating : 4.:/5 (31 download)
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1982 with total page 1262 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 : Edward Robert Landa
Publisher :
ISBN 13 :
Total Pages : 274 pages
Book Rating : 4.:/5 (319 download)
Download or read book The Behavior of Technetium-99 in Soils and Plants written by Edward Robert Landa and published by . This book was released on 1975 with total page 274 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:
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ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (683 download)
Download or read book Baseline Tritium Concentrations in Soils and Vegetation written by and published by . This book was released on 1998 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: In compliance with Department of Energy (DOE) Order 5400.1, a preoperational environmental survey was conducted for the Tshirege woodland site--an experimental area managed by the Earth and Environmental Science Group (EES-15)--where radioactive tritium (3H) will be injected ten cm deep in and around the base of pinyon (Pinus edulis) and one-seeded juniper (Juniperus monosperma) trees during the summer of 1990. The site is located at the lower end of Canada del Buey close to the intersection of Pajarito and State Road 4. Baseline values of 3H were measured in soil and plant samples from five locations immediately surrounding the study area. Mean values of 3H in soils collected from the 0--5 and 25--30 cm depths were 1.24 ("0.22) and 1.08 ("0.41) pCi mL−1, respectively. Pinyon needles averaged 1.68 ("0.18) pCi mL−1 and blue grama grass (Bouteloua gracilis) averaged 1.16 ("0.95) pCi mL−1.
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ISBN 13 : 9788755013681
Total Pages : 29 pages
Book Rating : 4.0/5 (136 download)
Download or read book Determination of Technetium-99 in Environmental Samples by Solvent Extraction at Controlled Valence written by and published by . This book was released on 1987 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : G. Desmet
Publisher : Springer
ISBN 13 : 9789400941908
Total Pages : 436 pages
Book Rating : 4.9/5 (419 download)
Download or read book Technetium in the Environment written by G. Desmet and published by Springer. This book was released on 2011-11-25 with total page 436 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 : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309255716
Total Pages : 424 pages
Book Rating : 4.3/5 (92 download)
Download or read book Analysis of Cancer Risks in Populations Near Nuclear Facilities written by National Research Council and published by National Academies Press. This book was released on 2012-06-29 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the late 1980s, the National Cancer Institute initiated an investigation of cancer risks in populations near 52 commercial nuclear power plants and 10 Department of Energy nuclear facilities (including research and nuclear weapons production facilities and one reprocessing plant) in the United States. The results of the NCI investigation were used a primary resource for communicating with the public about the cancer risks near the nuclear facilities. However, this study is now over 20 years old. The U.S. Nuclear Regulatory Commission requested that the National Academy of Sciences provide an updated assessment of cancer risks in populations near USNRC-licensed nuclear facilities that utilize or process uranium for the production of electricity. Analysis of Cancer Risks in Populations near Nuclear Facilities: Phase 1 focuses on identifying scientifically sound approaches for carrying out an assessment of cancer risks associated with living near a nuclear facility, judgments about the strengths and weaknesses of various statistical power, ability to assess potential confounding factors, possible biases, and required effort. The results from this Phase 1 study will be used to inform the design of cancer risk assessment, which will be carried out in Phase 2. This report is beneficial for the general public, communities near nuclear facilities, stakeholders, healthcare providers, policy makers, state and local officials, community leaders, and the media.
