Patent ID: 6415011
Filing Date: 2002-07-02
Classification: G21C,Y02E

Abstract:
A fuel assembly for a nuclear boiling water reactor, the fuel assembly comprising a plurality of spacers wherein at least one of said spacers comprises a plurality of cells for holding parallel elongated elements extending through the cells or for allowing said elements to pass through the cells, wherein a plurality of flow channels are defined between the cells which flow channels allow a cooling medium to flow therethrough, wherein, when the fuel assembly is in use in a nuclear boiling water reactor, the elongated elements extend in an essentially vertical direction and the flow of the cooling medium takes place mainly in a vertical direction upwards, wherein at least one of said spacers comprises a plurality of deflecting members which are arranged to deflect the flow of the cooling medium, wherein said plurality of said deflecting members comprises a vane which extends in a direction from a cell into the neighboring flow channel, wherein the vane is inclined relative to a vertical plane, wherein the vane is wider in its upper part than in its lower part, wherein there is only one vane per flow channel, wherein the deflecting member also comprises a plane or somewhat bent base portion which has an extension in a vertical direction, wherein the vane and the base portion form a continuous unit, wherein the vane is folded-out from the base portion and thus meets the base portion along a line, wherein the base portion constitutes a continuous unit together with a cell, wherein the vane is formed as a folded-out portion of the cell, and wherein the vane is folded-out such that it forms an angle of about 75-120 degrees with the base portion.