Deutsche Gesellschaft Fur Wiederaufarbeitung Von Kernbrennstoffen Mbh

Heinolf Schrader

Gunter Schroder

Rudolf Eichhorn

Guenter Schroeder

Guenther Dudek

The invention is directed to a container for receiving and safely storing radioactive or other materials damaging to living organisms, especially such materials as vitrified radioactive fission products or irradiated nuclear reactor fuel elements. The container includes a vessel and a sealing cover. The vessel has a circular opening at one of its ends for receiving the materials to be stored therein, and a sealing cover is seated in this opening to tightly seal the container. In order to obtain a container of the kind which has the required high impermeability to gas, the open end of the inner bore of the vessel is widened to define a conical surface. A sealing cover is pressed into the vessel at this conical surfce. The sealing cover has a peripheral surface which converges toward the interior of the vessel and which has a taper corresponding to that of the conical surface of the vessel. The vessel wall and sealing cover are welded together by means of a fused-mass joint extending around the entire periphery of the cover. By means of the conical configuration of the upper end portion of the vessel and of the sealing cover, a considerably improved seal between the vessel wall and the sealing cover is obtained. A method for sealing the container is also disclosed.

Container for receiving and safely storing radioactive materials and

Apparatus is described for feeding a wire from a wire coil to a processing tation. When wire is taken from a coil and fed to a processing station, because of the tension imposed on the wire, the wire end carries out uncontrolled movements which in arc welding are known as 'pig-tailing' effects. In order to obviate such uncontrolled movements of the wire after issuing from conventional guide means, in the present wire guide apparatus the wire is guided with a radius of curvature r which is equal to the radius of curvature which the cylindrical spring formed by the cylindrically wound wire has in its relaxed state. The wire guide apparatus comprises a guide tube which is joined tangentially to the coil housing and which is constructed with a slightly curved shape. Connected to the guide tube is a mouthpiece which has a curved tubular duct the radius of curvature of which is equal to the radius of curvature r. The outer diameter of the cylindrical reel on which the wire is wound is preferably greater than the inner diameter of the relaxed cylindrical spring constituted by the wound wire.

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Bruchhausen-Vilsen, Germany

Heinolf Schrader