Fuel assembly with a removable end fitting

Details Fuel assembly with a removable end fitting Fuel assembly with a removable end fitting

G - Physics

21

C

294/24, 359/36

G21C 7/10 (2006.01) G21C 3/326 (2006.01) G21C 3/334 (2006.01)

Patent

CA 1110783

ABSTRACT A typical embodiment of the invention provides a nuclear fuel assembly lock structure for control rod guide tubes. Illustratively, a sleeve telescopes over an end portion of a control rod guide tube which bears against an internal shoulder of the tube. The upper end of the sleeve protrudes beyond the control rod guide tube spider and is locked in place by means of a resilient cellular lattice or lock that is seated in a mating groove in the outer surface of the sleeve. A special tool is provided for disengaging the entire lock structure, washer, spider, spring and grill from the end of the fuel assembly in order to enable these components to be removed in an assembled state and subse- quently replaced on the fuel assembly after inspection and repair.

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