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MOX fuel arrangement for nuclear core

United States Patent

5,822,388
October 13, 1998
View the Complete Patent at the US Patent & Trademark Office
Lawrence Berkeley National Laboratory - Visit the Technology Transfer and Intellectual Property Management Department Website
In order to use up a stockpile of weapons-grade plutonium, the plutonium is converted into a mixed oxide (MOX) fuel form wherein it can be disposed in a plurality of different fuel assembly types. Depending on the equilibrium cycle that is required, a predetermined number of one or more of the fuel assembly types are selected and arranged in the core of the reactor in accordance with a selected loading schedule. Each of the fuel assemblies is designed to produce different combustion characteristics whereby the appropriate selection and disposition in the core enables the resulting equilibrium cycle to closely resemble that which is produced using urania fuel. The arrangement of the MOX rods and burnable absorber rods within each of the fuel assemblies, in combination with a selective control of the amount of plutonium which is contained in each of the MOX rods, is used to tailor the combustion characteristics of the assembly.
Kantrowitz; Mark L. (Portland, CT), Rosenstein; Richard G. (Windsor, CT)
Combustion Engineering Inc. (Windsor, CT)
08/ 749,795
November 15, 1996
The U.S. Government has rights in this invention pursuant to Contract DE-AC03-93SF19682 between the U.S. Department of Energy and Combustion Engineering, Inc.