Partial length rod upper end plug and grapples therefor

Details Partial length rod upper end plug and grapples therefor Partial length rod upper end plug and grapples therefor

1993-02-16

1994-01-18

Wasil, Daniel D.

Induced nuclear reactions: processes, systems, and elements

Handling of fission reactor component structure within...

Fuel component

376271, 376451, G21C 310, G21C 1910

Patent

active

052805085

ABSTRACT:
A part length fuel rod tip and group of tip grasping tools is set forth for the removal, inspection and replacement of part length fuel rods from a fuel bundle having a part length rods interspersed with a majority of conventional full length rods. The part length fuel rod tip includes a longitudinal keyway allowing torque to be exerted on the fuel rod and a horizontal slot enabling grasping of the fuel rod for vertical withdrawal and replacement movement of the fuel rod. The tools include a torque socket for applying high torque forces to the part length rod for unscrewing the rod when the rod becomes stuck at its threaded connection to the lower tie plate, a tip grasping tool for permitting normal unscrewing torque and grasping for vertical withdrawal and replacement, and finally a tool having both high torque and grasping characteristics. In each case, the diameter of the tools is restricted to enable access to the part length fuel rods through the spacers overlying the upwardly exposed ends of the part length fuel rods.

REFERENCES:
patent: 4202727 (1980-05-01), Batjukov et al.
patent: 4297776 (1981-11-01), Fogg
patent: 4374801 (1983-02-01), Albin
patent: 4539174 (1985-09-01), Patenaude
patent: 4715111 (1987-12-01), Kapoor et al.
patent: 5112570 (1992-05-01), Dix et al.

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