Abstract: The invention relates to a catalyst element for a recombinator for eliminating hydrogen from accident atmospheres, in which the technical problem of continuously efficiently converting both small and large amounts of hydrogen with the atmospheric air-oxygen present in the safety containers within a broad concentration range, and routing away the reaction heat arising in the process to such an extent that the respective ignition temperature is not reached in the present mixture is resolved by having the catalyst element exhibit a flat basic body (2), which is arranged within the area of flow through the recombinator, wherein the surface of the basic body (2) over which the accident atmosphere flows has a varying coverage density with catalyst material (3).

Abstract: A device for the catalytic conversion of hydrogen in a containment of a reactor containing a gas mixture. The device includes a recombiner which is disposed in the containment and has a plurality of catalytically active catalyst elements, a first cooling unit which is disposed upstream of the recombiner and cools the gas mixture and a second cooling unit disposed downstream from and behind the recombiner. The device effectively eliminates hydrogen resulting from an accident in the containment, without flashback. The device also suppresses heating of the atmosphere in the containment.

Abstract: A device for the cooling and intermixing of gas from accidental leaks, such as from a nuclear reaction containment, i.e., accident atmospheres, which device prevents stratification and provides improved cooling capacity. The device includes a housing, having an inlet and an outlet and which predefines a flow path for the accident atmosphere. The device has a fan wheel, which is disposed in the housing downstream from the inlet and which is connected to a shaft. The device also has a cooling device which is disposed between the fan wheel and the outlet. A compressor wheel is connected to the shaft at the end thereof which is opposite to the fan wheel. The compressor wheel is disposed between the cooling device and the outlet.