Single Phase Ceramic Wasteforms for Plutonium Disposition

N.C. Hyatt; M.C. Stennett; Ewan R. Maddrell; William Edward Lee

doi:10.4028/www.scientific.net/AST.45.2004

Paper Titles

Electrical Conductivity of Proton Conductive Ceramics under Reactor Irradiation
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Reducing Hydrogen Penetration through Corrosion Layer Formed on Zirconium Alloys by Iron Addition
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Processing Ceramics for Radioactive Waste Immobilisation
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Influence of Noble Metal Particles on Redox Reactions on Uranium Dioxide Surfaces
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Single Phase Ceramic Wasteforms for Plutonium Disposition
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Synthesis and Characterisation of BaM^IV(PO₄)₂ in the View of Conditioning of the Actinides
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Immobilization of Hafnium Surrogates in Fluorapatite
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Application of Protonic Conduction in Perovskite-Type Oxides: Mixed Proton-Electron-Conducting Membrane for Hydrogen Separation
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Studies in Mesoporous Silicates: Impedance Measurements on SBA-15 Loaded with Sulfonated-Polystyrene and Nafion with SBA-15 Filler
p.2033

HomeAdvances in Science and TechnologyAdvances in Science and Technology Vol. 45Single Phase Ceramic Wasteforms for Plutonium...

Single Phase Ceramic Wasteforms for Plutonium Disposition

Abstract:

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.