METHOD OF MAKING DIRECTING CHANNEL OF NUCLEAR REACTOR FUEL ASSEMBLY Russian patent published in 2009 - IPC G21C3/04 

FIELD: physics, nuclear physics.

SUBSTANCE: invention relates to the atomic industry and can be used in plants for making fuel assemblies mainly of the type water-moderated water cooled power reactor for APP. Method includes the assembly of channel pipes with capturing bushing, turning to the zone of seam welding. Subsequent welding it with the pipe slot weld, where the turning on the capturing bushing is carried out with the thickness of the walls, equal to 0.3-0.5 of the thickness of the channel pipes, and width from two to three times of this walls. Assembly of bushing with the pipe is carried out with a gap of not more than 20% from the thickness of the walls of the turning. Welding is carried out with penetration of the walls of the pipe till 0.8 of its thickness, and the welding is carried out at a speed of 1-1.3 cm/sec, value of the welding current 10-15 mA voltage acceleration 30±1 kilovolts for a period of 18-21 seconds.

EFFECT: developing of an effecient method of making a directing channel.

2 cl, 4 dwg