Pluto fuel element fabrication at Lawrence Radiation Laboratory

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Declassified 26 Nov 1973. Development of an extrusion-based process for producing beryllia fuel elements for the Pluto nuciear powered ramjet is described. The goal was to extrude and fire hexagonal tubes to close dimensional tolerances without grinding. Sinterable beryllia powder was fueled by precipitating uranium and fuel additives from a single aqueous solution in which the beryllia had been slurried. After sintering, the fuel phase consisted of a phasestabilized solid solution of urania (UO/sub 2/) with yttria and zirconia. Principal operations consisted of slurrying and precipitation, filtration, drying and calcination, vehicle incorporation and mixing, extrusion, drying and vehicle burnout, and … continued below

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Sandholtz, W.A. February 1, 1965.

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  • Lawrence Livermore Laboratory
    Publisher Info: California Univ., Livermore (USA). Lawrence Livermore Lab.
    Place of Publication: Livermore, California

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Declassified 26 Nov 1973. Development of an extrusion-based process for producing beryllia fuel elements for the Pluto nuciear powered ramjet is described. The goal was to extrude and fire hexagonal tubes to close dimensional tolerances without grinding. Sinterable beryllia powder was fueled by precipitating uranium and fuel additives from a single aqueous solution in which the beryllia had been slurried. After sintering, the fuel phase consisted of a phasestabilized solid solution of urania (UO/sub 2/) with yttria and zirconia. Principal operations consisted of slurrying and precipitation, filtration, drying and calcination, vehicle incorporation and mixing, extrusion, drying and vehicle burnout, and hydrogen sintering (including straightening). Directions for continued development toward the no grinding'' goal are pointed out. (auth)

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  • Other Information: Declassified 26 Nov 1973. Orig. Receipt Date: 30-JUN-74

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  • February 1, 1965

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  • Oct. 15, 2017, 10:09 p.m.

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  • Nov. 6, 2017, 4:30 p.m.

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Sandholtz, W.A. Pluto fuel element fabrication at Lawrence Radiation Laboratory, report, February 1, 1965; Livermore, California. (https://digital.library.unt.edu/ark:/67531/metadc1021130/: accessed July 11, 2025), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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