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The Clinch River Breeder Reactor, per the current design, will have a breeding ratio of 1.20 at the start-of-life and 1.23 at the end of the first cycle. This value is expected to drop to approximately 1.12 in the equilibrium cycles if the present type fuel and blanket assembly designs are retained. However, with reasonably anticipated advances in fuel design technology, a breeding ratio of at least 1.20 can be maintained throughout the life of the plant. Potential equilibrium fuel assembly designs have been proposed which will accomplish this objective as well as achieve the design goal burnup, of 150,000 MWd/T. CRBR, with a peak linear power rating of 14.5kW/ft and an equilibrium breeding'ratio of 1.20, has a compound system" doubling time of approxiinately 34 years.'"

DOE ContractNo. DE-AC09-89SR18035 This paperwas preparedin connectionwithwork doneunderthe abovecontractnumberwiththe U. S. Departmentof Energy. By acceptanceofthis paper, the publisherand/orrecipientacknowledgesthe U. S. Government'srightto retaina nonexclusive,royalty-freelicensein and to any copyrightcoveringthis paper, alongwith the rightto reproduceand to authorizeothersto reproduceall or part of the copyrightedpaper. MASTER D4j_=IIBUT!ON OF THIS D, OCUMENT I_ UNLIMrI'ED _'_'_/ DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government.

This paperwas preparedin connection with work doneunderthe abovecontractnumberwith the U. S. Departmentof Energy. By acceptanceof thispaper, the publisherand/orrecipientacknowledgesthe U. S. Governrnent's rightto retaina nonexclusive,royalty-freelicensein and to any copyrightcoveringthis paper, alongwiththe rightto reproduceand to authorizeothersto reproduceall or part of the copyrightedpaper. DINTRIBUTION OF THIS DOCUM&Nr iS UNLIMITED q, DISCLMMER This report was prepared as an account of work sponsored by an agency of the United States Government.