EVALUATION OF THE RADIOACTIVE POLLUTION OF THE TERRITORIESAROUND KRASNOYARSK-26

摘要

The objective of this study, funded by DGXI (now DGEnv (Directorate General Environment) of theEuropean Commission, was to evaluate the impact of radiological contamination in the environment,which has resulted from the operations at the nuclear establishments at Krasnoyarsk-26, and todetermine whether any remedial actions are required. Environmental data has been obtained for a widerange of environmental media and for a number of years covering the period before and after the closureof the single pass reactors at Krasnoyarsk-26. These media include air (aerosols and deposition),water, sediments, soil, floodplain deposits, foodstuffs and vegetation. Information was also obtained ondemography, meteorology and the general geological, geographical and hydrological characteristics ofthe regions. A GIS (Geographical Information System) system was established to contain all of thisdata and to display a number of themes. The sampling and analytical methodologies were evaluated andthe data were examined to determine any trends with time or distance from the contamination sources.The data were compared with other global data available in the open literature. A methodology for theradiological assessment of the contamination was established and the calculations performed. The resultsof the radiological assessments showed that the most significant exposures resulted from the occupancyand use of the contaminated floodplains and from the potential exposure to hot particles. Doses ofseveral millisieverts a year could result from some of the most contaminated sites and of tens tohundreds of millisieverts from hot particles. Criteria for remedial action and a number of remediationoptions were evaluated.