Abstract
After more than 35 years operation the uranium mining and milling facilities near Pecs city in Hungary were finally shut down in 1997. One of the most important and most complicated tasks is the remediation of tailings ponds because of the complexity of chemical, radiological and geotechnical requirements of the restoration. Tailings ponds are potential sources of radiactive contaminants through both aerial and terrestrial pathways. The potential risk of environmental contamination from the latter route has been substantially decreased by pretreatment of the soil (liming) before construction. The main task of the restoration now is to decrease radon emanation and wind erosion of the ponds, to give geotechnical stability and environmental friendly shape to the resulting pile and to prevent soil erosion from the slopes.
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