End plug weld for nuclear fuel rod

Induced nuclear reactions: processes – systems – and elements – Fuel component structure – Having particular end closure or seal

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376261, G21C 310

Patent

active

049216635

ABSTRACT:
An end plug is welded to a nuclear fuel rod tube by a girth weld having a melt-zone arcuately extending through the tube wall and into the plug, wherein the melt-zone and the end of the tube are separated by a predetermined distance. The distance is chosen such that heat is dissipated from the weld-zone to prevent damage to the rod and to prevent damage to the weld end stop. This weld enables the use of a substantially solid cylindrical end plug having a first end disposed inside the tube, a second end, and a hollow cavity extending to the second end for axially aligning the cylinder and fuel rod with a frictionally engaging weld stop during formation of the girth weld.

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