Method of welding nuclear reactor fuel assemblies

Details Method of welding nuclear reactor fuel assemblies Method of welding nuclear reactor fuel assemblies

1976-11-12

1979-01-30

Engle, Samuel W.

Electric heating

Microwave heating

Tunnel furnace

219 8624, 266 64, G21C 330, B23K 928, B23K 500

Patent

active

041371259

ABSTRACT:
A method of welding tabs projecting outwardly from grip straps in a fuel assembly grid to a control rod guide thimble positioned in a cell in the grid including providing a weld guide having openings therein which receive dimples on the strap when the weld guide is placed in a cell adjacent to the cell containing the control rod guide thimble. THe weld guide includes an opening which falls into alignment with a tab so that when a welding gun electrode is placed through the opening and into contact with a tab, the other electrode is automatically centered on its tab thus permitting accurate spot welding of the parts. To make a second spot weld on the same tab but at a point outwardly from the first spot weld, a second weld guide having an opening therein displaced a greater distance from a reference point on the weld guide, is placed in the same cell and the welding process repeated.

REFERENCES:
patent: RE9114 (1880-03-01), Gardner
patent: 2250845 (1941-07-01), Stefano
patent: 2451123 (1948-10-01), Schultz
patent: 2464906 (1949-03-01), Unger
patent: 2614198 (1952-10-01), Avery
patent: 2931887 (1960-04-01), Leist
patent: 3417477 (1968-12-01), Nowotny
patent: 3430028 (1969-02-01), Goforth
patent: 3562482 (1971-02-01), Friedberg
patent: 3791466 (1974-02-01), Patterson

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