The impact of a U-mill tailing on radionuclide accumulation by plants was assayed. In particular, a preliminary screening
of 226Ra, 238U and 230Th in Marsh marigold (Caltha palustris L.), soft rush (Juncus effusus L.) and Tall Moor grass (Molinia arundinacea (L.) Moench) grown in a marsh habitat is presented. Activity concentrations for the studied radionuclides and their transfer
factors for the particular plants are shown and discussed.