Fuel assemblies for nuclear reactors.

摘要

A nuclea fuel assembly (10) includes a sleeve (100)that surrounds but is not attached to a guide tube (14). The sleeve (100) is attached to a wall of a cellular void (24) of a spacer grid (15), through which void the guide tube (14) extends. The sleeve (100) has tabs (101) projecting outwardly therefrom to modify the flow of a coolant.