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.
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Ferguson D E, Dean O C and Haas P A 1961CEND-153 (USA: Oak Ridge National Laboratory) 1
Ganguly C 1980Studies on preparation and sintering of (U, Pu) C, (U, Pu)N and (U, Pu) (CN) pellets, Ph.D. thesis, University of Calcutta, Calcutta
Ganguly C 1990aIndian J. Technol. 28 296
Ganguly C 1990bMetals, Mater. Process. 1 253
Ganguly C, Langer H, Zimmer E and Merz E 1986Nucl. Technol. 152 84
Ganguly C, Linke U and Kaiser E 1987Metallography 20 1
Ganguly C, Basak U, Vaidya V N, Sood D D and Roy P R 1989Proc. IInd inter. conf. on CANDU fuel, Chalk River, Canada, pp 108–124
Ganguly C and Basak U 1991J. Nucl. Mater. 178 179
Ganguly C, Hegde P V and Sengupta A K 1991J. Nucl. Mater. 178 234
IAEA 1974Proc. IAEA panel on sol-gel processes, Vienna, IAEA-161
Matzke Hj 1986Science of advanced LMFBR fuels (North Holland: Elsevier Science publications)
Naefe P and Zimmer E 1979Nucl. Technol. 42 163
Ringel H D and Zimmer E 1979Nucl. Technol. 45 287
Vaidya V N, Mukherjee S, Joshi J K, Kamat R V and Sood D D 1987J. Nucl. Mater. 148 324
Zimmer E, Ganguly C, Borchardt J and Langer H 1988J. Nucl. Mater. 152 169
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Ganguly, C. Sol-gel microsphere pelletization: A powder-free advanced process for fabrication of ceramic nuclear fuel pellets. Bull. Mater. Sci. 16, 509–522 (1993). https://doi.org/10.1007/BF02757652
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DOI: https://doi.org/10.1007/BF02757652