Lower end nozzle of a fuel assembly having a particle retention device and fuel assembly having such an end nozzle
AssigneesFramatome, Cogema
InventorBernard Grattier
Life of this patent
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Abstract
The lower end nozzle (1) comprises an adaptor plate (2), supporting feet (3) and a particle retention device (6) consisting of a filter plate pierced with holes and attached to the bottom face of the adaptor plate (2) over a substantial portion of its surface.
Claims19
A lower end nozzle of a nuclear fuel assembly, comprising an adaptor plate (2, 2', 2") having water passage holes and a bottom face, supporting feet (3, 12, 15) and a device for the retention of particles contained in the coolant flow of the reactor, in which the retention device (6, 11, 16, 30, 46) consists of a filter plate pierced with filtration holes having a smaller size than said water passage holes and being fastened against the bottom face of the adaptor plate over a substantial part of its surface.
a nuclear fuel assembly having guide tubes (8) with lower ends attached to a lower end nozzle (1) having openings therethrough (41) for a coolant flow and a debris filter, said filter comprising a plate (6, 11, 16, 30, 46) attached to the bottom of the adaptor plate (2, 2', 2"), said adaptor plate comprising coolant flow apertures disposed in a square array.
Dependencies are inferred from the claim text.