Induced nuclear reactions: processes – systems – and elements – Fuel component structure – Plural fuel segments or elements
Reexamination Certificate
2006-06-09
2008-11-18
Keith, Jack W (Department: 3663)
Induced nuclear reactions: processes, systems, and elements
Fuel component structure
Plural fuel segments or elements
C376S440000, C376S449000, C376S364000, C411S190000, C411S201000, C411S204000
Reexamination Certificate
active
07453972
ABSTRACT:
A secure connection between the bottom nozzle of a nuclear fuel assembly and the control rod guide thimbles having two or four crimped pockets in the side wall of a bottom nozzle leg counterbore which are formed by drilling two or four blind holes through the top surface of the bottom nozzle. After attaching the bottom nozzle to the fuel assembly with a crimp bolt a pneumatic tool is then inserted into a flanged cup feature on the crimp bolt head and the flanged portion of the cup feature of the crimp bolt is deformed into the crimp pockets. The crimp pockets are contained within the leg counterbore and prevent the screw from rotating or falling out of the assembly in the event of preload loss or screw fracture.
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Bausch Michael O.
Broders Richard P.
Hellandbrand, Jr. Patrick A.
Kereakoglow Stephen C.
Dudnikov Vadim
Keith Jack W
Westinghouse Electric Co. LLC
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