Method and apparatus for adjusting the elevation of fuel rods in

Details Method and apparatus for adjusting the elevation of fuel rods in Method and apparatus for adjusting the elevation of fuel rods in

1978-11-24

1981-05-05

Walsh, Donald P.

Metal working

Method of mechanical manufacture

Repairing

29266, 74413, 81 3K, 176 30, 176 87, 254103, B22D 1910, B23P 1904, B66F 318, G21C 1920

Patent

active

042650100

ABSTRACT:
Method and apparatus for adjusting the level of fuel rods in a fuel assembly which includes a tool having an end insertable between a fuel assembly nozzle plate and the exposed ends of fuel rods. The insertable end of the tool includes stationary and movable plates, the movable plate having a portion which rests on flanges in a forked end of the stationary plate while the other end of said movable plate is bent in a manner such that it lies above the stationary plate. A pair of gears are located in the space defined by the spaced ends of said plates, and screw threaded shafts extend through threaded openings in the movable plate and into gears located in the space between the ends of the plates, so that when one of the shafts is rotated, the force transmitted through said gears causes the other shaft to rotate and the coaction of both threaded shafts thus causes the movable plate to move in a direction away from the stationary plate, and in so doing, cause the fuel rod in contact with the movable plate to be moved in an axial direction and into a position where the end thereof lies in the same plane as the ends of other fuel rods in the assembly.

REFERENCES:
patent: 158001 (1874-12-01), Quail
patent: 2150831 (1939-03-01), Haney
patent: 3009313 (1961-11-01), Wheeler
patent: 3665586 (1972-05-01), Jabsen
patent: 4119490 (1978-10-01), Delafosse

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