Browsing by Author "Davy, DR"

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    The Alligator Rivers area fact finding study: four AAEC reports
    (Australian Atomic Energy Commission, 1974-06) Conway, NF; Davy, DR; Giles, MS; Newton, PJF; Pollard, DA
    The work described in this series of reports is part of the Joint Government-Industry Fact Finding Study carried out in the 'Uranium Province' of the Alligator Rivers Area, Northern Territory, during 1971—73. The primary objective was to determine the sensitivity of the existing environment to the range of potential pollutants arising from a uranium extractive industry. A comprehensive ichthyography is given of species collected in the area. Results are reported of experimental and bioassay studies on selected flora and fauna exposed to heavy metals, raffinate and Alamine-336. Studies are also recorded on the chemical and radiological qualities of natural waters, the solubility of uranium in sediments, and the fate of dissolved trace elements in the drainage systems. The radiological aspects of the area are discussed with specific reference to exposure routes, bit ogical concentration factors, and the significance of natural and man made changes in levels of radiation to man and other biota in the region. Radon levels in costeans, core-sheds and bore water are recorded and discussed.
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    Effects on the surrounding population of postulated major accidents at the AAEC Research Establishment
    (Australian Atomic Energy Commission, 1972-11) Button, JCE; Carruthers, E; Cook, JE; Crancher, DW; Davy, DR
    The consequences of accidents in specific facilities at the Research Establishment are examined in terms of possible exposure of persons living around Lucas Heights to release airborne radioactive and toxic materials. In the case of radioactive materials both individual and population doses are estimated the latter over a range of meteorological conditions. Using currently available data on the risk of development of adverse effects in irradiated populations further estimates are made of the possible number of cases of such effects in the local population.
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    Environmental survey at the AAEC Research Establishment Lucas Heights - results for 1973.
    (Australian Atomic Energy Commission, 1974-12) Davy, DR; Dudaitis, A
    This report tabulates the results of the environmental survey at Lucas Heights during 1973 and compares them with derived maximum permissible concentrations appropriate to the local environment. Possible doses to individual members of the local population as a result of Research Establishment operations are less than those due to weapons test fallout and much less than those due to natural radiation background.
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    Environmental survey at the AAEC research establishment, Lucas Heights - results for 1974.
    (Australian Atomic Energy Commission, 1976-04) Davy, DR; Dudaitis, A
    This report tabulates the results of the environmental survey at Lucas Heights during 1974 and compares them with derived maximum permissible concentrations appropriate to the local environment. Possible doses to individual members of the local population as a result of Research Establishment operations are less than those due to weapons test fallout and much less than those due to natural radiation background.
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    Meteorological and radiation measurements at Nabarlek, Northern Territory, June to July 1979
    (Australian Atomic Energy Commission, 1981-09) Clark, GH; Davy, DR; Bendun, EOK; O'Brien, BG
    A meteorological and radiation measurement program was conducted near the then developing uranium mine at Nabarlek in the Northern Territory. The two-filter tube radiation measuring technique was checked and compared with the continuous radon monitor and instant working level meter techniques. In general the Nabarlek meteorology was characterised by weak stable layers and good ventilation conditions with winds rarely less than 1ms -1. A comparison of wind measurements made near the open pit with those taken some 800 m away gave evidence of horizontal changes in the wind field over the site. Strong daytime winds gusting higher than 10 ms -1 caused a visible suspension of dust from the site. Dust deposition samples indicated that thorium-230 in air on site was a factor of twelve below the maximum permissible concentration for employees in Australia but uranium was lower by several orders of magnitude. The concentrations of radioactivity in the aquatic food pathway external radiation levels and radon daughter concentrations from deposited dust were likewise at least two orders of magnitude below the maximum concentrations permissible in Australia.
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    Predictions for radon sources and some related concentrations for the Koongarra Uranium Development, Northern Territory
    (Australian Atomic Energy Commission, 1978-10) Davy, DR
    Estimates are provided for the total quantity of radon that would be released per day as a result of the proposed development of the Koongarra uranium deposit. The estimated quantity varies with the phase of development; it is greatest (560 GBq d-1) during phase II, at which time the ore stockpile and the tailings dam contribute 70% of the total. Predicted concentrations for radon daughters near the bottom of the open pit also vary with phase of development but, in this case, atmospheric stability is the major variable. During phase II, working level (WL) concentrations are expected to vary from 0.035 to 4.6 WL at a height of 1 m above the pit floor as atmospheric stability changes from unstable to neutral conditions.
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    Proceedings of the AAEC symposium on environmental and radiological safety aspects of the mining and processing of uranium, Lucas Heights, 9-10 December 1971.
    (Australian Atomic Energy Commission, 1973-04) Warner, RK; Watson, GM; Davy, DR; Hardy, CJ; Button, JCE; Cook, JE; Conway, NF
    Review of world trends in the uranium industry (a summary); Philosophy of environmental protection and control; Sources of pollution in uranium mining and processing activities (a summary); Environmental studies for uranium provinces - aims and methods; Methods of control of potential pollutants (a summary); Introduction to radiological safety; Radiological health and safety aspects of uranium mining and ore treatment; Biological effects of radiation; History of radiation effects and control in uranium mining; The nature of the dosimetry problem; Practical dosimetry in uranium mining; Prospects for control of radiological hazards in uranium mining.
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    Progress report for Environmental Science Division, July 1981 - June 1982
    (Australian Atomic Energy Commission, 1983-06) Davy, DR
    Projects in environmental studies include: leaching of uranium ores; uranium mine waste management; heavy metal and radionuclide environmental transport; airborne pollutant transport; radiation dosimetry physics; toxicity of marine pollutants; uptake and loss of Ra-226 by mussels; and radiation biology - chromosome aberrations in lympocytes and dose-response relationships. A list of publications included can be found below: - Uranium Mining and Milling - Waste Treatment and Disposal - Transport of Heavy Metals and Radionuclides through the Environment - Ion Chromatography - Application of Track Etch Techniques - Rum Jungle Environmental Studies - Modelling the Pyritic Oxidation Process in Waste Rock Dumps - Tritium Levels in Seawater - Airborne Pollutant Transport - Environmental Radon Measurements - Radiation Dosimetry Physics - Cost Analysis for a SYNROC Production Plant - Marine Pollution Studies - Role of Aquatic Macrophytes in Radium Cycling on the Magela Floodplain - Primary Productivity of Estuarine Benthic Microalgae and Element Concentrations in Sediment Interstitial Water and Sediment - Uptake and Loss of Radium-226 by Freshwater Mussels - Toxicity of Copper to Freshwater Fauna - Effects of Phomopsin on Chinese Hamster Cells in Vitro - Chromosome Aberrations in Peripheral Blood Lymphocytes after partial body exposure to Radiation - Radiation dose-response of Amphibia - Journals papers - Conference proceedings - AAEC Reports
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    Radon survey at the Koongarra uranium deposit, Northern Territory
    (Australian Atomic Energy Commission, 1978-11) Davy, DR; Dudaitis, A; O'Brien, BG
    A survey of radon concentrations in groundwater soil-air and the atmosphere was made at the Koongarra Uranium Deposit, Northern Territory. Radon daughter concentrations in the atmosphere were measured for a range of atmospheric stability categories and are expressed in working level units. Surface radon emanation rates were measured over undisturbed sections of the ore body to provide an estimate of the daily rate of radon release from the ore body; this estimate was then compared with the value expected from an above-ground tailings dam constructed as a result of mining of the ore body. Surface radon emanation rates were also measured for small mock heaps designed to be representative of waste rock and ore stockpile material. Taken collectively, the data can be used to provide estimates of radon source terms and radon concentrations in and from a mining and milling operation based on the deposit.
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    Rum Jungle environmental studies
    (Australian Atomic Energy Commission, 1975-09) Davy, DR
    Sources of pollution were identified and their relative importance assessed. Observations were made on seasonal variations and differences were noted between the dispersion patterns of several metals of interest. The geographical extent of chemical and biological pollution was examined. Some understanding of the basic mechanisms involved in continuing pollution was obtained and an attempt was made to determine the fate of heavy-metals.
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    Three baseline studies in the environment of the uranium deposit at Yeelirrie, Western Australia. Paper I, the distribution of some naturally occurring elements in the environment of theYeelirrie Uranium Deposit, Western Australia. Paper II, groundwater quality in the general area of the Yeelirrie Uranium Deposit. Paper III. environmental level of radon-222 and its daughters
    (Australian Atomic Energy Commission, 1978-05) Brownscombe, AJ; Davy, DR; Giles, MS; Williams, AR
    Paper I - The distribution of some naturally occurring elements in the environment of the Yeelirrie Uranium Deposit, Western Australia. Paper II - Groundwater quality in the general area of the Yeelirrie Uranium Deposit. Paper III - Environmental levels of radon-222 and its daughters.