Patent ID: 6236701
Filing Date: 2001-05-22
Classification: G21C,Y02E

Abstract:
A fuel assembly for a boiling water reactor which is adapted, during operation of the reactor, to allow coolant to flow upwards through the fuel assembly, and wherein the fuel assembly comprises a plurality of fuel rods, each of which having an upper end and a lower end,a steam conducting channel through which steam flows through the fuel assembly, anda fuel channel (7) surrounding the fuel rods, characterized in that the fuel assembly comprises a rotary cell (13a-13d) in which the fuel rods (4, 20) are arranged in a number of concentric rings (15, 16) with a substantially circular shape, and said steam conducting channel (17a-17d) is arranged in the centre of the concentric rings, and that at least certain of the fuel rods in the rings are arranged such that their upper ends are displaced in relation to their lower ends in a tangential direction such that the flowing coolant is brought to rotate around the steam conducting channel.