Induced nuclear reactions: processes – systems – and elements – Reactor structures – Orifice or fluid control at inlet or outlet of coolant channels
Patent
1988-06-22
1990-02-13
Dehrend, Harvey E.
Induced nuclear reactions: processes, systems, and elements
Reactor structures
Orifice or fluid control at inlet or outlet of coolant channels
376313, 376434, 376443, G21C 1930, G21C 1506
Patent
active
049005073
ABSTRACT:
A debris filter bottom nozzle in a fuel assembly has support structure in the form of four legs adapted to rest on a lower core plate of the nuclear reactor and a nozzle plate fixed one side of the four legs facing toward a lowermost grid of the fuel assembly. The nozzle plate has defined therethrough only a plurality of flow holes individually smaller in size than the maximum dimension of unoccupied spaces through the lowermost grid which allow flow of liquid coolant through the nozzle plate. Therefore, any debris being carried by the liquid coolant flowing through the bottom nozzle from the lower core plate to the fuel assembly which is small enough in size to pass through the flow holes will also pass through the unoccupied grid spaces, whereas any debris which is large enough to not pass through the unoccupied grid spaces and collect in the grid will not pass through the aperture plate flow holes.
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Ferlan Stephen J.
Shallenberger John M.
Dehrend Harvey E.
Westinghouse Electric Corp.
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