Leaf spring puller for nuclear fuel rods

Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator

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Details

29259, 29263, B23P 1904

Patent

active

042977762

ABSTRACT:
A fuel rod puller in the form of a collet for pulling fuel rods from a storage area into grids of a nuclear reactor fuel assembly. The rod puller moves longitudinally through the grids to a storage area where projections on the end of leaf springs grasp onto an end plug in a fuel rod. Drive apparatus then pulls the rod puller and connected fuel rod from the storage area into the fuel assembly grids. The rod puller includes an outer tube having leaf springs on one end thereof in one modification, mounted within the outer tube is a movable plunger which acts to urge the leaf springs outwardly to a position to permit passing or with the end of a end plug. Upon withdrawal of the plunger, the leaf springs move into a groove formed in the end of a fuel rod end plug, and the fuel rod subsequently is pulled into the fuel assembly grids. In another modification, the leaf springs on the outer rod are biased in an outward direction and a longitudinally movable tube on the outer rod is moved in a direction to contract the leaf springs into a position where the projections thereof engage the groove formed in a fuel rod end plug.

REFERENCES:
patent: 1141742 (1915-06-01), Wiseman
patent: 1632720 (1927-06-01), Worster
patent: 1801984 (1931-04-01), Schafer
patent: 2924483 (1960-02-01), Koch et al.
patent: 3266835 (1966-08-01), Hall et al.
patent: 3604746 (1971-09-01), Notari
patent: 3857599 (1974-12-01), Jones et al.
patent: 3905634 (1975-09-01), Johnson et al.
patent: 4059883 (1977-11-01), Osborne

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