Fuel assembly skeleton with structural and non-structural top nozzle/guide thimble joints

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4699760





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A fuel assembly skeleton includes a top nozzle, a number of longitudinally-extending guide thimbles having upper ends, a number of joints interconnecting the top nozzle and the upper ends of the guide thimbles. All but a few of the joints are structural joints providing rigid connections between all but a corresponding few of the guide thimble upper ends and the top nozzle. Each of the other few joints is a non-structural joint providing a non-rigid connection between a guide thimble upper end and the top nozzle. The number of structural joints constitutes at least a substantial majority of the joints and, in any event, the number is at least three times the number of non-structural joints. Each non-structural joint is composed of a hollow sleeve rigidly connected to the top nozzle and disposed in a slip fit relationship about the guide thimble upper end. The sleeve is bulge fitted in a passageway defined in the top nozzle.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
Westinghouse Electric Corp.PITTSBURGH, PA545

International Classification(s)

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Inventor Name Address # of filed Patents Total Citations
Ferlan, Stephen J Wilkins Township, Allegheny County, PA 24 223
Shallenberger, John M Fox Chapel, PA 27 252

Cited Art Landscape

Patent Info (Count) # Cites Year
Westinghouse Electric Corp. (1)
* 4572816 Reconstituting a nuclear reactor fuel assembly 15 1983
* 4522782 Fuel assembly for a nuclear reactor 7 1982
The United States of America as represented by the United States Department of Energy (1)
* 4515750 Sealing coupling 28 1982
Combustion Engineering, Inc. (2)
* 4557891 Pressurized water reactor flow arrangement 6 1982
* 4584168 System for controlling destructive vibration of a nuclear control rod 10 1983
* 4535523 Fuel assemblies for nuclear reactors 11 1983
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
Westinghouse Electric Corp. (1)
* 5363423 Quick release top nozzle assembly 5 1993
9031185 Fuel assembly, a guide thimble device and use of the guide thimble device 0 2011
Combustion Engineering, Inc. (1)
* 4792429 Spring retention cap 11 1987
Framatome ANP Inc. (2)
* 7239683 Fuel assembly nozzleless handling tool and method 1 2003
* 2005/0135,540 Fuel assembly nozzleless handling tool and method 1 2003
* 7551705 Fuel assembly top nozzle repair sleeve and method for repairing a fuel assembly 3 2003
7424084 Fuel assembly nozzleless handling tool and method 0 2007
* 2008/0112,529 Fuel assembly nozzleless handling tool and method 1 2007
* 4999154 Demountable fuel assembly for a nuclear reactor cooled by light water 1 1989
* Cited By Examiner