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US 5,491,733 AGranted
Nuclear fuel rod assembly apparatus
AssigneeSiemens Power Corporation
InventorsJohn F. Patterson, George C. Cooke, Jack Yates, Trond A. Bjornard
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AssigneeSiemens Power Corporation
InventorsJohn F. Patterson, George C. Cooke, Jack Yates, Trond A. Bjornard
Estimating the term…
The present invention provides a fuel rod for a light water nuclear reactors that comprises a part-length fuel rod and an extension tube having at least one wall member defining an enclosed flow path therethrough, the extension tube being coupled to a portion of the part-length fuel rod so as to be disposed axially above the part-length fuel rod, and including at least one inlet opening, for allowing fluid that surrounds the rod and initially comprises a two phase mixture of steam and liquid, to enter the enclosed fluid path and at least one outlet opening located above the inlet opening, the extension tube includes means for separating at least some of the steam located in the fluid from the liquid located therein. The improved fuel rod allows steam to bypass the upper active portions of the fuel assembly. A coolant diverter is positioned in a spacer of a nuclear fuel rod assembly in the large subchannel above a part length fuel rod for increasing the hydraulic resistance of the large subchannel and for separating liquid from two phase flow.
A coolant diverter for a nuclear reactor fuel assembly having a plurality of substantially parallel elongated fuel rods and a spacer for positioning and laterally restraining the fuel rods, the coolant diverter for diverting at least a portion of liquid coolant in a two phase coolant flow onto adjacent fuel rods, the coolant diverter comprising:
A nuclear fuel reactor fuel assembly comprising;
In a nuclear reactor fuel assembly having plurality of elongated, substantially parallel fuel rods including at least one part length fuel rod and a fuel rod spacer, the improvement comprising:
In a nuclear reactor fuel assembly having plurality of elongated, substantially parallel fuel rods, and a fuel rod spacer, the improvement comprising:
Dependencies are inferred from the claim text.