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|Title:||Environmental survey at Lucas Heights Research Laboratories, 1991.|
|Publisher:||Australian Nuclear Science and Technology Organisation|
|Citation:||Hoffmann, E. L. & Loosz. T. (1994). Environmental survey at Lucas Heights Research Laboratories, 1991. (ANSTO/E708). Lucas Heights, NSW: Australian Nuclear Science and Technology Organisation.|
|Abstract:||In common with many other nuclear facilities ANSTO undertakes an extensive program of meteorological measurements. The prime reason for such a program is to allow estimates to be made of the downwind concentration of any airborne pollutants particularly radionuclides released from the site through routine operations or under accident conditions. The data collection from this program provide the necessary input to the atmospheric dispersion model called ADDCOR (ANSTO 1989) which can be used to compute the effective dose to an individual due to the routine airborne or accidental release of radionuclides from the LHRL. None of the samples taken from possible human food chains in the vicinity of the Lucas Heights Research Laboratories contained radioactivity which could be attributed to the operation of the site. Discharges of airborne radioactive gases were within authorised limits when averaged over the year. The dose to the most sensitive members of the public from iodine-131 release was < 0.4 x 10 -3 mSv/year and the calculated dose from released noble gases to the most exposed individuals was less than 0.01 mSv/year. These figures represent less than one per cent of the most restrictive limits recommended by the National Health and Medical Research Council of Australia. The annual average liquid effluent discharge to the Water Board Sewer during 1991 was less than 29 per cent of the permitted level. For tritium the concentration was less than 2 per cent of the specified limit. The data presented in this report clearly shows that the environmental impact of operations at LHRL has been very low. The effective dose to residents living in the immediate neighbourhood of the reactor are very difficult to measure directly but calculated dose estimates are far lower than those due to natural background radiation and medical exposures.|
|Gov't Doc #:||489|
|Appears in Collections:||Scientific and Technical Reports|
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