Abstract: Recovering fission material from solid raw wastes and producing a space-saving product which can be committed to ultimate storage by the following steps:(a) a comminution of the raw wastes to a grain size of about 5 mm(b) dissolution thereof at elevated temperature in an organic solvent until a concentration of about 10 percent by weight is reached(c) separation of insoluble raw waste particles larger than 1 mm.(d) separation of the undissolved fission material content remaining in the polymer solution by means of a centrifuge(e) evaporation and condensation of the solvents for return into the dissolving process according to (b)(f) embedding the waste component from (c) into the remaining plastic melt(g) drawing-off the melt and solidification thereof in storage containers.