Single phase, solid-solution mixed uranium/refractory metal carbides have been proposed as an advanced nuclear fuel for high performance, next generation space power and propulsion systems. These mixed carbides such as the pseudo-ternary, (U, Zr, Nb)C, hold significant promise because of their high melting points (typically greater than 3200 K), thermochemical stability in a hot hydrogen environment, and high thermal conductivity. However, insufficient test data exist under nuclear thermal propulsion conditions of temperature and hot hydrogen environment to fully evaluate their performance. Various compositions of (U, Zr, Nb)C were processed with 5% and 10% metal mole fraction of uranium. Stoichiometric samples were processed from the constituent carbide powders while hypostoichiometric samples with carbon-to-metal (C/M) ratios of 0.95 were processed from uranium hydride, graphite, and constituent refractory carbide powders. Processing techniques of cold pressing, sintering, and hot pressing were investigated to optimize the processing parameters necessary to produce dense (low porosity), homogeneous, single phase, solid-solution mixed carbide nuclear fuels for testing. This investigation was undertaken to evaluate and characterize the performance of these mixed uranium/refractory metal carbides for space power and propulsion applications.


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    Titel :

    Processing of mixed uranium/refractory metal carbide fuels for high temperature space nuclear reactors


    Beteiligte:
    Knight, Travis (Autor:in) / Anghaie, Samim (Autor:in) / Bragg, Mary J. (Herausgeber:in) / El-Genk, Mohamed S. (Herausgeber:in)

    Kongress:

    SPACE TECHNOLOGY AND APPLICATIONS INTERNATIONAL FORUM - 2000 ; 2000 ; Albuquerque, New Mexico (USA)


    Erschienen in:

    AIP Conference Proceedings ; 504 , 1 ; 1448-1453


    Erscheinungsdatum :

    19.01.2000


    Format / Umfang :

    6 pages





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Processing of Mixed Uranium/Refractory Metal Carbide Fuels for High Temperature Space Nuclear Reactors

    Knight, T. / Anghaie, S. / University of New Mexico | British Library Conference Proceedings | 2000


    Processing of Pseudo-Ternary Carbide Fuels for High Temperature Space Nuclear Reactors

    Knight, T. / Anghaie, S. / University of New Mexico; School of Engineering; Institute for Space and Nuclear Power Studies | British Library Conference Proceedings | 1999


    Processing of pseudo-ternary carbide fuels for high temperature space nuclear reactors

    Knight, Travis / Anghaie, Samim | American Institute of Physics | 1999



    Mixed carbide high temperature fuels

    CARMACK, WILLIAM / HOBBINS, RICHARD / LESSING, PAUL | AIAA | 1991