07453972 is referenced by 25 patents and cites 9 patents.

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.

Title
Nuclear fuel assembly control rod drive thimble to bottom nozzle connector
Application Number
11/450077
Publication Number
7453972 (B2)
Application Date
June 9, 2006
Publication Date
November 18, 2008
Inventor
Richard P Broders
Grandbury
CT, US
Michael O Bausch
Lexington
SC, US
Stephen C Kereakoglow
Columbia
SC, US
Patrick A Hellandbrand Jr
East Hartford
CT, US
Assignee
Westinghouse Electric Co
PA, US
IPC
G21C 3/32
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