Induced nuclear reactions: processes – systems – and elements – Fuel component structure – Plural fuel segments or elements
Patent
1993-05-21
1996-02-13
Wasil, Daniel D.
Induced nuclear reactions: processes, systems, and elements
Fuel component structure
Plural fuel segments or elements
G21C 3322
Patent
active
054917336
ABSTRACT:
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.
REFERENCES:
patent: 2980667 (1961-04-01), Coombs
patent: 3787286 (1974-01-01), Anthony
patent: 4675154 (1987-06-01), Nelson et al.
patent: 5091146 (1992-02-01), Dix
patent: 5130082 (1992-07-01), Oosterkamp
patent: 5229068 (1993-07-01), Johansson et al.
Bjornard Trond A.
Cooke George C.
Patterson John F.
Yates Jack
Siemens Power Corporation
Wasil Daniel D.
Zebrak Ira Lee
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