METHOD FOR PRODUCTION OF SPACERS FOR A NUCLEAR REACTOR

摘要

A method for production of spacers to hold at least a number of elongated fuel rods (5) in a fuel unit (20) for placement in a re- actor (1 ) is described. The method comprises the steps of pro¬ viding at least two spacers (30), to provide a set of mandrels (40) comprising a number of mandrels (42), to arrange at least two spacers (30) with one on top of the other on the set of mandrels (40), and to heat treat the spacers (30) when they are arranged on the set of mandrels (40) so that the cells (31 ) in the spacers (30) adapts to the mandrels (42).