Patent ID: 6658078
Filing Date: 2003-12-02
Classification: G21C,Y02E

Abstract:
A mixed oxide nuclear fuel assembly employable for a thermal neutron/light water reactor comprising:a plurality of nuclear fuel rods arranged in a matrix in a channel box and means to allow flowing light water acting as both a moderator and a coolant in spaces between said nuclear fuel rods, said mixed oxide nuclear fuel assembly being positionable in a reactor core, wherein: 20 through 40% of the quantity of said nuclear fuel rods are mixed oxide nuclear fuel rods, each of which contains fissionable plutoniums having only one kind of enrichment grade selected from a range of 5 through 15 weight %, and 80 through 60% of the quantity of said nuclear fuel rods are UO2 fuel rods containing U isotopes at least including U235.