• Sol-gel microsphere pelletization: A powder-free advanced process for fabrication of ceramic nuclear fuel pellets

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      https://www.ias.ac.in/article/fulltext/boms/016/06/0509-0522

    • Keywords

       

      Sol-gel pelletization; ceramic nuclear fuel pellets

    • Abstract

       

      Hydrated gel-microspheres of U, Pu, Th oxide or oxide plus carbon mixture of diameter 400–800µ were prepared by ammonia gelation processes. They were dried and subjected to suitable treatment for obtaining free-flowing oxide, carbide or nitride micro-spheres of diameter 200–400µ suitable for direct pelletization and sintering. The oxide, carbide and nitride pellets were, in general, sintered at high temperature in Ar+8% H2. However, for UO2 and (U, Pu)O2 pellets low temperature (1200 °C), short duration (1 h) oxidative (CO2 or N2+air) sintering (LTS) was also successful, thereby reducing electrical energy and gas consumption during sintering. Thus, the combined SGMP-LTS process simultaneously minimized “radiotoxic dust hazard” and fuel fabrication cost in case of UO2 and (U, Pu) O2 pellets.

    • Author Affiliations

       

      C Ganguly1

      1. Radiometallurgy Division, Bhabha Atomic Research Centre, Bombay - 400 085, India
    • Dates

       
  • Bulletin of Materials Science | News

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