FUEL PLUG OF NUCLEAR REACTOR Russian patent published in 2010 - IPC G21C3/10 B23K11/00 

FIELD: power engineering.

SUBSTANCE: welded part of plug additionally contains mould flash in form of face at 45° to generatrix of surface of plug in its welded part. The face is located at (4÷6)·δ distance, where δ is thickness of cladding, from surface of cold contact of the welded part of the plug with the end of cladding. A transition part of the plug has cylinder and conic elements. Surface of the face is conjugated with surface of the cylinder element of the plug transition part, which in its turn is conjugated with surface of the conic element of the plug transition part through radius (0.7÷2)·δ. Angle between generatrix of surface of the cylinder element of the plug transition part and a base of the conic element of the plug transition part with bigger diametre is 45°, while distance from the base of the conic element of the plug with smaller diametre to surface of cold contact of the welded part of the plug with the end of cladding is equal to (8÷10)·δ.

EFFECT: increased reliability of fuel element operation, reduced expenditures for its production.

10 dwg