Abstract: There is provided a furnace for incinerating nuclear fission and/or fertile material waste, particularly plutonium and/or uranium containing organic waste by pyrohydrolysis with steam or burning with air oxyen in safe geometry, said furnace comprising in combination a stationary cylindrical outer jacket having a funnel shape at the bottom thereof, a rotatable inner cylinder likewise terminating at the bottom in a funnel shape whose diameter is so regulated that the interval between the outer jacket and the inner cylinder guarantees a safe layer thickness and scrapers which are disposed on the inner surface of the outer jacket and the outer surface of the inner cylinder.

Abstract: Fuel particles in a fluidized bed are provided with a coating of pyrolytic carbon having substantially no property gradients by holding the speed of growth constant during the entire coating time and insuring the same speed of growth in all particles of the particle bed.

Abstract: Apparatus for the continuous purification of gases contaminated with tritium by catalytic burning of tritium enriched hydrogen in a catalytic furnace and subsequent absorption of the tritium containing oxidation product. The apparatus has at least two gas storage containers which can be filled selectively by operating appropriately arranged valves, at least one catalytic furnace and at least one absorption plant for the oxidation product formed by way of which the gas storage container can be emptied selectively by appropriately arranged valves.

Abstract: Molded block fuel elements having an isotropic structure useful for gas cooled high temperature power reactors are prepared by first producing an isotropic graphite granulate of high density with a definite porosity from a molding powder and then hot pressing this isotropic granulate together with coated fuel particles at low pressure to isotropic fuel element. The molding powder for making the granulate is made from a mixture of natural graphite and binder resin, synthetic graphite and binder resin or a mixture of both types of graphite powder with binder resin.

Abstract: Molded or pressed block fuel elements of high power for gas cooled high temperatures are produced by molding in steel tools using outer dies or bars and punches arranged to be freely moveable in the axial direction and moving said moveable dies or bars and punches in the molding process.

Abstract: Block fuel elements for high temperature power reactors that can be reprocessed simply are prepared in which the feed and breed zones are connected with the graphite matrix directly and without transition. They are disposed separately from each other in such a manner that the feed zones and the breed zones can be separately removed one after the other from the structural graphite. In the reprocessing operation there are recovered uranium 233 from the breed particles, uranium 235 and fission products from the feed particles.

Abstract: Prismatic graphite molded objects for high temperature fuel elements are prepared by producing the outer geometry and the holes for cooling channels and for receiving fuel and fertile materials in the formation of the carbon object.