FIELD: physics, nuclear.
SUBSTANCE: invention relates to fuel assemblies of a pressurised water reactor. The fuel assembly, which enables to burn mixed oxide fuel, has a pile of completely annular fuel pellets in fuel rods. Radial enrichment in the assembly is zoned with reduction of the weight percentage enrichment of Pu fuel rods with radial displacement from the central zone of the fuel assembly to the next zone.
EFFECT: relatively smooth distribution of power between rods of an assembly irrespective of properties of neighbouring assemblies.
5 cl, 7 dwg
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