Kernforschungsanlage Julich

Kraftwerk Union Aktiengesellschaft

Forschungszentrum Julich Gmbh

Wolfgang Krug

Johann Seferiadis

Peter Rau

Martin Peehs

Wilfried Jung

Helmut Heybutzki

Horst Stechemesser

Lothar Britz

A current pass-through arrangement for a rodlike electrode passing substantially perpendicularly through a hot wall of a container features an inner seal and an outer seal, with the outer seal located at a substantially cooler position than the hot wall. Preferably, a portion of the electrode is tightly fitted into a cylindrical bushing of electrically insulating material. The electrode projects out of this bushing, at least at the container-adjacent end. In turn, the bushing is tightly fitted into a wall element (4) having a smaller-diameter end and a larger-diameter end which is sealed into the container wall. The wall element (4) and the electrode centered within it define an annular space which is at least partly filled with sealing material (5). According to a further embodiment, the electrode also projects from the container-remote end of the bushing (3). An open-topped cylindrical vessel (6) concentrically surrounds the projection electrode and defines another space at least partly filled with sealing material. This sealing material surrounds the container-remote end of the wall element (4).

Container having a hot wall with a high-temperature-tolerant current

A pump for cryogenic liquids is provided with an enclosing vessel of the construction of a Dewar flask. A submerged multistage rotary pump is suspended from the mouth of the flask by means of a system providing thermal insulation opposing the flow of heat down the neck of the flask. The drive motor is coupled to the drive shaft of the immersion pump through a magnet coupling of which the elements are separated by a pressure seal. The latter and the extensive thermal insulation make the pump suitable for pumping liquid air or liquid nitrogen in a pressurized closed circuit and the presence of a supply of the cryogenic liquid around the pump itself makes it possible to start the pump at once after a quiescent period. A level-control sonde operates to assure that the presence of the necessary minimum of liquid in the vessel.

Pump for very cold liquids

A gas-cooled nuclear reactor, having a tight connection with an intentionally provided leak site between a fission-gas discharge channel formed in a reactor core carrying plate as well as in a head portion of encased fuel elements that are suspended in receiving bores formed in the core carrying plate, the tight connection being formed by an annular member having a sealing surface engaging the core carrying plate at a region thereof in which an opening to the fission-gas discharge channel formed in the core carrying plate is located, a gas-tight, elastic and substantially cylindrical member, variable in length, connecting the annular member to the fission-gas discharge channel formed in the head portion of the fuel element, compression spring means biasing the annular member in a direction away from the fission gas discharge channel formed in the fuel-element head portion, and a sealing abutment plate secured to a central pin and limiting clearance for play of the annular member with respect to an annular zone thereof disposed within the sealing surface of the annular member, the leak site including a radial bore formed in and extending through the annular member between the annular zone and the sealing surface of the annular member.

Tight connection between fission gas discharge channels

Growing community of inventors

Julich, Germany

Wolfgang Krug