Abstract: Electromagnetic pump for circulating and stirring liquid metal in a vessel. The pump is arranged in a liquid-metal-resistant immersion box. The pump has an approximately horizontal pump canal with the openings on two opposite sides of the liquid-metal-resistant immersion box. The pump can be immersed in the liquid metal bath by means of a suspension device. The pump canal has an elongated cross section and the longest dimension of the cross section is vertical. Comb-shaped magnet coil cores with magnet coils are arranged on both broad sides of the pump canal.

Abstract: A pipeline carrying high-temperature fluids and having an inner conduction pipe, an outer pressure pipe and ceramic insulation disposed between the inner and outer pipes and formed of individual sections being spaced apart defining gaps therebetween, includes ceramic insulating rings formed of woven insulating fiber filling the gaps between the sections of the ceramic insulation, the rings being concentrically disposed one against the other on the inner pipe and having doubled-over edges.

Abstract: Method for conveying liquid metal by means of two series-connected electromagnetic pumps, of which one is an immersion pump and the other a canal pump, characterized by the feature that the immersion pump is continuously operated with low or medium output and the dosing and/or control of the liquid-metal flow is accomplished by connecting the canal pump aiding or bucking.

Abstract: A high-temperature nuclear power plant, includes a reactor, an inner vessel enclosing the reactor, an outer reactor pressure vessel disposed outside the inner vessel, a stub integral with the outer vessel, and a hot gas pipeline disposed in the stub, the improvement comprises a screw connection being releasable from outside the outer vessel for fastening the hot gas pipeline to the inner vessel, and a device connected to the hot gas pipeline for applying a force to the hot gas pipeline in a direction tending to separate the hot gas pipeline from the inner vessel.

Abstract: A magnetic-inductive flow meter, includes a pipe section for carrying fluid flowing in a given direction, insulation in the form of a ceramic tube disposed loosely inside of the pipe section, magnet coils disposed on the outside of the pipe section for producing a magnetic field in the pipe section perpendicular to the given flow direction, at least two electrodes disposed inside the pipe, holding pieces wedged against the ceramic tube for securing the ceramic tube against rotation, and leads connected to the electrodes and disposed inside the ceramic tube, the leads being extended through the pipe section beyond an end of the ceramic tube.

Abstract: Coupler for absorber rods being suspended during operation of nuclear reactors including a plurality of actuating elements being movable for individually and jointly releasing the coupler, the movement of each of the actuating elements for releasing the coupler being independently controllable.

Abstract: Method of non-destructively determining response pressure of a reversible rupture disc which includes: measuring resonance frequencies of lower vibration modes of the reversible rupture disc at varying measuring pressures below the response pressure of the reversible rupture disc; and extrapolating from the resonance frequencies of each of the vibration modes as a function of the measuring pressure, that pressure at which the resonance frequency of the respective vibration mode becomes zero, the lowest pressure at which one of the vibration modes would have zero resonance frequency being the lowest response pressure of the reversible rupture disc; and apparatus for performing the method.

Abstract: Steam generator, preferably for use in nuclear energy plants, which comprises several coiled tube bundles (5) which are arranged in series and disposed in a common container (1), in which steam is generated and superheated thereafter. The individual tube bundles are separated from each other by interspaces (16) in which straight connecting tubes are arranged. Points which require inspection, and are possibly in danger of springing leaks, for example, the welded connections between the individual tube lengths, are positioned in these interspaces for easier accessibility. Furthermore in the same container are also tube bundles (21) arranged in which the steam is superheated. In the middle of the container a central tube (4) is arranged, in which the feedwater supply (6) is conducted, and which in operation closed by a blow-out disc (15), and which, if necessary can discharge the products of a liquid metal-water reaction.

Abstract: Acoustic transducer having a piezo-electric element, including a lead section connected to the piezo-electric element, the lead section being in the form of a metallic body having a high specific attenuation.

Abstract: Plant for thermochemically dissociating water by solar energy, the improvement therein including at least one substance enclosed in electromagnetic fields and heatable by solar energy absorption to a temperature above 1.100.degree. C., and method of operation of the plant.

Abstract: Device for performing vibration measurement of parts, having at least one measuring instrument making contact with a measuring point under spring load, and a manipulating device operatively associated with the measuring instrument for bringing the latter to the measuring point including means for retracting the measuring instrument into the manipulating device while the measuring instrument is brought to the measuring point by the manipulating device, the measuring instrument being detachable from the manipulating device, except for yieldable connections, during vibration measurement at the measurement point, the measuring instrument having means for firmly fixing the position thereof at the measuring point.

Abstract: The multiple wall angle connection allows to connect pipes and containers with great flexibility and a good compensation of the heat expansion. To connect two pipes (1, 2), for example, three coaxial angle connections (3, 4, 5) are interconnected. The internal connection (5) is connected to the first pipe (1) and the external connection (3) to the second pipe (2). The connections are interconnected by junction pieces (7) of semi-toric shape arranged at each side, at respective ends. Straight pipe portions (9-13 and 19-23) can be provided between the connections and the junction pieces. They can be cylindrical or conic. Control apparatus can be inserted within the space comprised between the different connections.

Abstract: A liquid metal-cooled nuclear reactor has a reactor vessel with a cover at the top thereof and is partly filled with liquid metal up to a given surface level, the liquid metal surface and the reactor-vessel cover defining therebetween a gas-filled space, at least one quasi-tight convection barrier being disposed in the space and subdividing it in elevation.

Abstract: Collecting tank for coolant escaping from a demolished vessel of a sodium-cooled nuclear reactor includes an outer steel shell having an inner lining of blocks stacked one on top of the other, frame means for holding the blocks at a side thereof within the collecting tank, and a common support structure, independent of the outer shell, supporting the frame means.

Abstract: Electroacoustic transducer having a piezoceramic transducer element includes an oxygen-impermeable and oxygen-nonabsorbing enclosure wherein the transducer element is received.

Abstract: Nuclear energy installation includes a nuclear reactor core, a primary circulatory loop connected to the reactor core and having a circulating liquid metal medium therein heated by the reactor core, a first heat exchanger having a primary side connected in the primary circulatory loop, and a secondary side, a secondary circulatory loop connected to the secondary side of the first heat exchanger and having a circulating liquid metal medium therein heated by heat transfer in the first heat exchanger from the liquid metal medium of the primary circulatory loop, a second heat exchanger having a primary side connected in the secondary circulatory loop, and a secondary side, a tertiary circulatory loop connected to the secondary side of the second heat exchanger and having a circulating water/steam medium therein heated by heat transfer in the second heat exchanger from the liquid metal medium of the secondary circulatory loop, a condenser having a vapor/condensate side thereof connected in the tertiary circulatory

Abstract: Device for producing conditions in a flowing medium permitting measurement of a representative temperature includes a twist-producing stage and a twist-reducing stage disposed serially in flow direction of the flowing medium within the flow cross section thereof and upstream of a temperature measuring sensor.

Abstract: A cooler for a bottom tray of a liquid metal-cooled nuclear reactor, the tray serving as a receptacle for a melting reactor core in the event of a hypothetical accident, comprising coolant distribution and collecting pipes disposed below the bottom tray about the circumference thereof, and a plurality of parallel tubes connecting said distribution and collecting pipes, said tubes being in the shape of involutes running between the center and circumference of said tray.

Abstract: An integrated pressurized-water reactor and steam generator is disclosed, particularly for ship propulsion and smaller stationary installations, in which circulating pumps of primary coolant loops are arranged in the upper part of a vertical pressure vessel close to the vessel's removable head. An annular steam generator is arranged centrally within the vessel, and above the outer periphery of a reactor core in the vessel's lower portion, and is suspended via a separate hollow ring supported by the vessel's upper portion and in which the impellers of the circulating pumps are arranged. The primary cooling water flows upwardly through the reactor core and the heat exchanger to the pumps located above, and from there, through a separate ring passage outside of the heat exchanger housing and core downward to again flow upwardly through the reactor core.

Abstract: For gas-cooled pebble-bed reactors, an absorber element in the form of a hollow, helical spiral coil is proposed, which moves directly through the pebble bed essentially through rotary motion. This form not only facilitates the penetration into greater depths of the pebble bed, but also has a substantially greater absorber effect as compared to the known, essentially cylindrical absorber rods with the same absorber volume, so that the number of absorber elements can be reduced.