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    Cramer, Alisha J. Cole, Jacqueline M. FitzGerald, Vicky Honkimaki, Veijo Roberts, Mark A. Brennan, Tessa Martin, Richard A. Saunders, George A. and Newport, Robert J. 2013. Effects of rare-earth co-doping on the local structure of rare-earth phosphate glasses using high and low energy X-ray diffraction. Physical Chemistry Chemical Physics, Vol. 15, Issue. 22, p. 8529.


    Metcalfe, B.L. and Donald, I.W. 2013. Radioactive Waste Management and Contaminated Site Clean-Up.


    Bingham, P A and Barney, E R 2012. Structure of iron phosphate glasses modified by alkali and alkaline earth additions: neutron and x-ray diffraction studies. Journal of Physics: Condensed Matter, Vol. 24, Issue. 17, p. 175403.


    2010. Waste Immobilization in Glass and Ceramic Based Hosts.


    2010. Waste Immobilization in Glass and Ceramic Based Hosts.


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Waste Loading of Actinide Chloride Surrogates in an Iron Phosphate Glass

  • James M. Schofield (a1), Paul A. Bingham (a1) and Russell J. Hand (a1)
  • DOI: http://dx.doi.org/10.1557/PROC-1107-253
  • Published online: 01 February 2011
Abstract
Abstract

Pyrochemical and aqueous processing of impure Pu metal and Pu oxide results in a waste stream that contains calcium, plutonium and americium chlorides (CaCl2, PuCl3 and AmCll3) that tend to form insoluble salt layers on top of melts during vitrification. By adding chlorides to ammonium dihydrogen phosphate, ammonium chloride is evolved during vitrification, leaving behind the Ca, Pu and Am cations as oxides. HfO2 and Sm2O3 were used as surrogates for PuO2 and Am2O3 respectively. The effects of waste loading and melt duration on some basic physical properties for different melt durations were investigated. Synthetic batches containing CaO, HfO2 and Sm2O3 in molar ratios 93.34 : 5.91 : 0.74 respectively, reflecting the waste composition, were mixed with a fixed glass composition of P2O5 (75 mol%) and Fe2O3 (25 mol%). NH4H2PO4 was used as a precursor material. The solubility of calcium, hafnium and samarium oxides into phosphate glasses is reported and elemental analysis of the glasses is compared with expected glass compositions.

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