[en] The unit consists of a cylindrical vessel which is heated from the outside. Inside the cylinder there is a perforated rotor with threaded surface. There is also an evaporation chamber and a centrofugal separator situated above it. The evaporation chamber bottom is provided with openings for spaying bitumen and the radioactive waste. The mixture is removed by means of an opening in the lower end of the separator. This invention is suitable for waste processing in research and power reactors, fuel fabrication and reprocessing plants and irradiation devices