Apparatus and method for removing nuclear fuel assembly end piec

Details Apparatus and method for removing nuclear fuel assembly end piec Apparatus and method for removing nuclear fuel assembly end piec

1988-12-15

1991-03-26

Walsh, Donald P.

Turning

Severing or cut-off

Infeed means

376436, 376264, 252627, 252633, B23B 304

Patent

active

050019490

ABSTRACT:
An apparatus is used for cutting guide tubes of a nuclear fuel assembly below an end-piece and removing the end-piece. The apparatus includes a mount which may be removably locked and centered on the end-piece. Cutting tools insertable in the guide tubes each include a hollow shaft whose end part is split by longitudinal slits into radially expandable fingers each having a cutting edge. A stem movable axially along each shaft cooperates therewith for spreading the fingers out radially and retracting them. The shafts are mounted for rotation on a plate which is vertically movable with respect to the mount by a jack and carries a motor for simultaneously rotating all shafts. The shafts are carried by an expansion unit movable vertically with respect to the plate by a jack and including the stems. A method for separating the end-piece with the apparatus is also described.

REFERENCES:
patent: 4522780 (1985-06-01), Shallenberger
patent: 4731219 (1988-03-01), Beneck

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