Single Phase Ceramic Wasteforms for Plutonium Disposition
Four single phase ceramic formulations were investigated as potential wasteforms for plutonium disposition, using Ce as a Pu surrogate: pyrochlore, Gd2(Zr1-2xCexHfx)O7; zirconolite, (Ca1-x/2Gdx/2)(Zr1-5x/2CexHfxGdx/2)Ti2O7; britholite, (Ca2+xY8-2xCex)Si6O26; and kosnarite, Na(Zr2-xCex)P3O12. The single phase solid solution limits for each formulation were established and the processing parameters required to produce high quality ceramic specimens were optimised. This was achieved within the constraints of a generic processing route suitable for fabrication of Pu bearing samples. Whereas the pyrochlore, zirconolite and britholite formulations show considerable promise as single phase ceramic wasteforms, the kosnarite formulation was found to be unsuitable.
N.C. Hyatt et al., "Single Phase Ceramic Wasteforms for Plutonium Disposition", Advances in Science and Technology, Vol. 45, pp. 2004-2011, 2006