Method of exchanging fuel in a nuclear reactor
AssigneeAB Asea-Atom
InventorsPer Lindgren, Sture Helmersson
Life of this patent
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Abstract
A method of refueling a nuclear reactor having a core containing a plurality of fuel rod bundles which are built up from a plurality of fuel rods includes replacing at least one burnt up fuel rod bundle with a fuel rod bundle which is at least partly composed of fuel rods from other fuel rod bundles burnt up in the reactor, the mean content of fissile material in the fuel rod bundle thus composed being higher than the mean content of fissile material in the fuel rod bundle which is replaced by the composed fuel rod bundle.
Claims7
Method of refuelling in a light water boiling nuclear-reactor having a core containing a plurality of fuel rod bundles which are built up from a plurality of fuel rods, comprising the steps of replacing at least one burnt-up fuel rod bundle with a fuel rod bundle which is at least partly composed of fuel rods from burnt-up fuel rod bundles from said reactor, and of selecting, when composing said composed fuel rod bundle for said light-water boiling reactor having uranium dioxide and any plutonium dioxide as fuel, said burnt-up fuel rod bundles having a maximum content of fissile material in the form of U 235, Pu 239 and Pu 241 of 1.75% of the initial weight of uranium and any plutonium in the fuel the mean content of fissile material in the fuel rod bundle thus composed being higher than the mean content of fissile material in the fuel rod bundle which is replaced by said composed fuel rod bundle.
Dependencies are inferred from the claim text.