FIELD: fuel assemblies including deflecting blades for deflection of liquid flow components in fuel cores of nuclear power reactors. SUBSTANCE: fuel assembly includes deflecting blades for deflection of flow of liquid running past such fuel assembly. Proposed fuel assembly includes lattice element with rhomboidal cells for rods and rhomboidal blind cells. Parallel fuel rods pass through respective cells and parallel guide blind tubes of control rods pass through respective blind cell. Set of deflecting blades connected with each cell is fastened integral with upper edges of each cell for rod. Each deflecting blade passes above rod cell connected with it and has curvilinear contour partially projecting above rod cell for deflection of component of liquid flow towards outer surface of fuel rod passing through rod cell. EFFECT: formation of vortex around longitudinal axis of fuel rod for maintenance of single-phase flow of liquid along outer surface of fuel rod, thus excluding DNB even at presence of considerable heat flows through outer surface of fuel rod. 3 cl, 10 dwg
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