Siemens Aktiengesellschaft

Kraftwerk Union Aktiengesellschaft

Reinhard Heck

Karl-Heinz Schwenk

Willi Siegler

Klaus-Dieter Werner

A device for the recombination of hydrogen and oxygen includes catalyst bodies having surfaces and a catalytic coating on the surfaces over which a gas and vapor mixture containing hydrogen to be eliminated is to be conducted. A casing which surrounds and retains the catalyst bodies has at least one permanently open gas inlet aperture and one permanently open gas outlet aperture, and a gas flow path in the casing through which the apertures communicate. The catalyst bodies are disposed downstream of the gas inlet aperture in the gas flow path. The catalyst bodies are flat bodies formed of multi-layered sheet metal in a multi-channel configuration forming a plurality of mutually parallel gas flow channels. Some of the gas flow channels have channel cross sections being defined by at least an adjacent two of the flat bodies being spaced-apart, and the gas flow channels at ends of the configuration have channel cross sections being defined by at least one of the flat bodies. The flat bodies each have a metal support sheet, a porous adhesion-promoting surface structure of the support sheet with a thickness of less than 10 .mu.m, a porous intermediate layer, preferably of Al.sub.2 O.sub. 3, applied to the surface structure for increasing surface area, and a catalyst coating of platinum or palladium being applied to the intermediate layer and distributed finely enough to preserve porosity of the intermediate layer.

Device for the recombination of hydrogen and oxygen and nuclear power

A device for the recombination of hydrogen and oxygen includes catalyst bodies having surfaces and a catalytic coating on the surfaces over which a gas and vapor mixture containing hydrogen to be eliminated is to be conducted. A casing which surrounds and retains the catalyst bodies has at least one permanently open gas inlet aperture and one permanently open gas outlet aperture, and a gas flow path in the casing through which the apertures communicate. The catalyst bodies are disposed downstream of the gas inlet aperture in the gas flow path. The catalyst bodies are flat bodies formed of multi-layered sheet metal in a multi-channel configuration forming a plurality of mutually parallel gas flow channels. Some of the gas flow channels have channel cross sections being defined by at least an adjacent two of the flat bodies being spaced-apart, and the gas flow channels at ends of the configuration have channel cross sections being defined by at least one of the flat bodies. The flat bodies each have a metal support sheet, a porous adhesion-promoting surface structure of the support sheet with a thickness of less than 10 .mu.m, a porous intermediate layer, preferably of Al.sub. O.sub. 3, applied to the surface structure for increasing surface area, and a catalyst coating of platinum or palladium being applied to the intermediate layer and distributed finely enough to preserve porosity of the intermediate layer.

A device for controlled combustion of an ignitable hydrogen/air mixture in a gas mixture of a nuclear power plant, especially in a containment thereof, includes a spark igniter for tripping an ignition process. At least one ignition source is connected to the spark igniter. The ignition source has a self-sufficient energy storage device. The ignition source has at least one first trip element connected between the spark igniter and the energy storage device for responding as a function of temperature to trip the ignition process, and at least one second trip element connected between the spark igniter and the energy storage device for responding as a function of pressure to trip the ignition process. The at least one first trip element is in thermally conductive contact and the at least one second trip element is in pressure-transmitting contact with the gas mixture to be monitored. The energy storage device discharges to the spark igniter if one of the trip elements responds. The spark igniter creates ignition sparks being repeated at intervals during an accident extending over a relatively long period of time.

Device for controlled combustion of an ignitable hydrogen/air mixture in

An apparatus for the recombination of hydrogen and oxygen with the aid of a catalyst includes a vertically extending tube having end surfaces. A catalyst body is disposed in the tube. Stoppers close the end surfaces of the tube and open as a function of at least one parameter from the group consisting of pressure and temperature.

Apparatus for the recombination of hydrogen and oxygen

An apparatus for the controlled combustion of ignitable hydrogen-air mixtures in the containment of water-cooled nuclear reactor plants includes at least one ignition source having a self-sufficient energy reservoir with a charge status being monitorable at regular time intervals. A tripping element of the ignition source responds as a function of temperature for tripping an ignition process and triggering a discharge of the energy reservoir in the ignition source during a predetermined period of time.

Apparatus for controlled combustion of ignitable hydrogen-air mixtures

Nuclear power station, including a containment for enclosing activity-carrying components having a given height and upper and lower parts, pipelines being extended in vertical direction in the containment over at least half of the given height thereof from the upper part to the lower part of the containment for mixing a gas atmosphere in the containment, the pipelines having an open top and bottom and an outlet in the lower part of the containment, a transporting device for mixing the gas atmosphere in the containment in the form of a blower connected in the pipelines for transporting gas from the upper part to the lower part of the containment in the pipelines, and a recombination device connected downstream of the blower in the pipelines for shunting the outlets thereof in the lower part and for targeted oxidation of free hydrogen within the containment.

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Hanau, Germany

Reinhard Heck