Ksb Kernkraftwerkspumpen Gmbh

Wolfgang Schneider

Robert Dernedde

Johannes Klein

Karl Fetzer

The housing of the primary recirculating pump in a nuclear reactor plant has a reinforced annular portion at the inlet and/or outlet and anchoring means provided on the annular portion and on the foundation to allow for limited movement of the housing relative to the foundation in response to development of major stresses which are likely to arise in the event of breakage of one or more pipes or as a result of earth tremors. The inertia of the annular portion or portions in response to temperature changes can be reduced by forming their end faces with one or more circumferentially complete grooves which surround the adjacent ends of the respective pipes. The anchoring means may comprise cylindrical pins which extend radially from the respective annular portion and into complementary sockets provided on clamps, claws or analogous anchoring parts in or on the foundation. The anchoring means may also comprise L-shaped clamps which are secured to the foundation and extend into a circumferential groove of the respective annular portion or overlie a ring-shaped projection of such annular portion.

Pump for use in nuclear reactor plants and anchoring means therefor

The accuracy of axial alignment of rotary shafts which are connected to each other by face gears is determined by micrometer screws which are moved into contact with annular control surfaces of the shafts. The control surfaces are normal to the axes of the respective shafts and, if their planes are not exactly parallel to each other, selected teeth of the mating face gears are elastically deformed to a greater or lesser extent to thereby tilt at least one of the shafts with respect to the other shaft until the two axes are accurately aligned with each other. The elastic deformation of selected gear teeth can be effected by bolts and nuts which connect the two shafts and extend in parallelism with their axes or by a composite annular clamp whose arcuate sections engage tapering surfaces on the flanges of the shafts and are held together by bolts which can tilt the shafts relative to each other by changing the width of gaps between neighboring sections.

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Hessheim, Germany

Wolfgang Schneider