Induced nuclear reactions: processes – systems – and elements – Fuel component structure – Plural fuel segments or elements
Patent
1989-12-01
1991-10-15
Walsh, Donald P.
Induced nuclear reactions: processes, systems, and elements
Fuel component structure
Plural fuel segments or elements
376285, 376364, 376434, 376445, G21C 332
Patent
active
050572725
ABSTRACT:
A fuel assembly has a top nozzle which includes a lower adapter plate and a plurality of guide structures thereon. The lower plate has a periphery bounding an interior thereof mounted by guide thimbles. The guide structures are attached to and extend along the periphery of lower plate and upwardly therefrom. The top nozzle also includes upper hold-down plate and a plurality of leaf spring assemblies. The upper plate is mounted to the guide structures for slidable movement relative thereto such that the upper plate can move toward and away from the interior of the lower plate within the space bounded by the guide structures as the upper plate slidably moves along the guide structures. The leaf spring assemblies are interposed between and engaged with the lower and upper plates so as to yieldably support the upper plate in spaced relation above the lower plate and bias the upper plate for movement away from the lower plate. The leaf spring assemblies are provided in a non-peripheral arrangement relative to the periphery of the lower plate in which the assemblies cross the interior of the lower plate in a diagonal fashion between adjacent ones of the guide structures.
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DeMario Edmund E.
Lawson Charles N.
Chelliah Meena
Walsh Donald P.
Westinghouse Electric Corp.
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