Method for encapsulating radioactive waste concentrates into non-deformable asphalt in a manner ready for ultimate disposal
AssigneeWerner & Pfleiderer
InventorHellmut Boden
Life of this patent
Estimating the term…
Abstract
Radioactive waste concentrates encapsulated into non-deformable asphalt at the inlet of an extruder feeding hard asphalt granules and hydrocarbon oil for mixing therein and downstream of the initial mixing adding the radioactive waste concentrates for mixing with the initial mixture.
Claims14
A method for the encapsulating of radioactive waste concentrates into non-deformable asphalt in a manner ready for ultimate disposal by the continous treatment of waste from industrial nuclear plants within an extruder with continuous evaporation of the water and admixing of the concentrate into the asphalt as a solidification substance for direct depositing within a container, characterized in that as solidification substance granulated asphalt and a hydrocarbon oil are introduced at the inlet end of the extruder in dosaged amount as components and are formed along a mixing path with addition of heat into a ductile asphalt into which the precipitation sludge is added downstream and homogeneously admixed with evaporation of the water contained therein.
A method for encapsulating radioactive waste concentrates in water into non-deformable asphalt for ultimate disposal comprising mixing by means of an extruder asphalt granules and hydrocarbon oil to reform the asphalt into a relatively softer, elastic structure, downstream of said mixing in the extruder adding the radioactive waste concentrates in controlled amounts for mixing with the asphalt-oil mixture in which the asphalt has been reformed, driving off the water in the asphalt-oil radioactive waste concentrates mixture by heating within the extruder, and delivering the final mixture from the extruder to a container whereby the mixing of the asphalt and oil and the subsequent mixing of the asphalt-oil mixture and the radioactive waste concentrates is effected within the same extruder.
Dependencies are inferred from the claim text.