SGMP-an advanced method for fabrication of UO2 and mox fuel pellets

Zimmer, E. ; Ganguly, C. ; Borchardt, J. ; Langen, H. (1988) SGMP-an advanced method for fabrication of UO2 and mox fuel pellets Journal of Nuclear Materials, 152 (2-3). pp. 169-177. ISSN 0022-3115

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The External Gelation of Uranium (EGU) process, though originally developed for preparation of fuel particles for High-Temperature Reactors (HTR), was also found to be attractive for Sol-Gel Microsphere Pelletization (SGMP) of UO2 and mixed oxide (MOX) fuel. No major changes of the process were necessary. However, for producing "porous microsphere" carbon black was added to the broth and later burnt out from the gel micropheres. Both "porous" and "non-porous" microspheres have been easily pelletized and sintered to high densities (≥ 95% TD) at relatively low temperatures (≤ 1500 ° C) in CO2 atmosphere. The "porous" microspheres led to sintered pellets having closed pores in the diameter range of 2-5 µm. Such pellets are good for retention of fission gases and are hence recommended for water-cooled reactor fuel pins. The pellets prepared from "non-porous" microspheres had "open pores" and are suitable for LMFBR fuel pins. UO2-5% CeO2 and UO2-30% CeO2 were chosen to simulate MOX fuels for thermal and fast reactors, respectively.

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ID Code:10716
Deposited On:09 Nov 2010 05:11
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