Abstract: Drying radioactive waste water concentrates from evaporators to produce a dried product of low residual moisture by(a) preheating a waste water concentrate with a solids content of at most 20% by weight to a temperature of 50.degree.-70.degree. C.,(b) passing the preheated concentrate with a solids content of at most 20% by weight into a two-cylinder drier at the rate of 10 to 20 liters per square meter of usable cylinder surface per hour,(c) maintaining the cylinder temperature between about 160.degree. to 210.degree. C.,(d) retaining the concentrate in the drier for a residence time of 7 to 18 seconds on the cylinder to produce a dried product of low residual moisture on the cylinder surface, and(e) discharging the dried product of low residual moisture from the cylinder surface.

Abstract: Method of removing radiant, pulverulent synthetic wastes which are mixed dry with a thermoplastic mass in a kneader and then delivered from a discharge opening of the kneader into a container capable of providing a final storage therefor, while gases and/or vapors are withdrawn from degassing domes of the kneader, which includes delivering fluidic dried wastes by mechanical movement through a metering tube into a degassing dome in the kneader disposed next to the discharge opening, and admitting scavenging gas into the metering tube at least temporarily in direction toward the kneader; and device for carrying out the foregoing method.

Abstract: An apparatus is provided for treating various radioactive concentrates having a liquid component, such as suspensions and salt solutions, which are present separately in a processing plant from evaporation systems, resin bead ion exchange filters, and from at least one further separating stage provided with, for example, mechanical filters, sedimentation basins and/or powdered resin ion exchange filters. The filter concentrates containing suspended solids are dewatered in a filter cake-producing filter and the concentrates from the evaporation system (salt solutions) are dewatered wholly or in part directly in transporting and storage drums to the dryness required for storage. At least one of the various concentrates are at least for a time conducted directly (without dewatering) into a storage drum where they are mixed with binders and converted to solids by hardening.

Abstract: Contaminated wash water in nuclear plants are processed by mixing the wash waters with ion exchange resins to form a suspension and then feeding the resulting suspension to a filter.