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Investigation of Processing Parameters for the Consolidation of Actinide Glass-Ceramic Wasteforms by Hot Isostatic Pressing

  • Stephanie Thornber (a1), Paul Heath (a1), Ewan Maddrell (a1) (a2), Martin C. Stennett (a1) and Neil C. Hyatt (a1)...


Glass-ceramics were developed initially for the immobilization of miscellaneous Pu-residues at the UK’s Sellafield site from which it was uneconomic to recover Pu for reuse. Renewed interest in the immobilization of a portion of the UK PuO2 stockpile has led to glass-ceramics being evaluated for bulk Pu immobilization. The Nuclear Decommissioning Authority (NDA) in the UK have proposed hot isostatic pressing (HIP) as a potential consolidation technique for the processing of these wasteforms. In this study, zirconolite based glass-ceramics were investigated to determine an optimum formulation. The yield of zirconolite is shown to vary with glass composition and glass fraction, such that a higher Al content favours zirconolite formation. The sample preparation process is discussed to highlight the importance of a high temperature heat-treatment during sample preparation to achieve high quality HIPed wasteforms.


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1 Stewart, M.W.A., Moricca, S.A., Vance, E.R., Day, R.A., Maddrell, E.R., Scales, C.R., and Hobbs, J., “Hot-Isostatic Pressing of Chlorine-Containing Plutonium Residues and Wastes;” pp. 675682 in TMS2013 Suppl. Proc . Edited by Tms, . John Wiley & Sons, Inc., Hoboken, NJ, USA, 2013.
2 Scales, C. R., Maddrell, E. R., Hobbs, J., Stephen, R., Moricca, S., and Stewart, M. W. A., Building flexibility into the design of a pilot plant for the immobilisation of Pu containing residues and wastes. Brussels, Belgium, 2013.
3 Scales, C. R., Maddrell, E. R., and Dowson, Mark, “Developing ceramic based technology for the immobilisation of waste in the Sellafield site;” in Proceeding 2009 12th Int. Conf. Environ. Remediat. Radioact . Waste Manag. Liverpool, UK, 2009.
4 Nuclear Decommissioning Authority, Conditioning of Plutonium Residues by Hot Isostatic Pressing and Options for packaging and Disposal (pre-conceptual stage) Summary of Assessment Report. 2009.
5 Vance, E.R., Stewart, M.W.A., and Moricca, S.A., “Progress at ANSTO on SYNROC,” J. Aust. Ceram. Soc., 50 [1] 3848 (2014).
6 Harker, Alan B and Flintoff, John F, “Crystalline-Phase Formation in Hot Isostatic Pressing of Nuclear Waste Ceramics with High Zirconia Content,” J. Am. Ceram. Soc., 68 [3] 159165 (1985).
7 Stewart, Martin W.A., Moricca, Sam S., Eddowes, Tina, Zhang, Yingjie, Vance, Eric R, Lumpkin, Gregory R, Carter, Melody L, Dowson, Mark, et al. ., “The use of Hot-Isostatic Pressing to process nuclear waste forms;” in Proc. 2009 12th Int. Conf. Environ. Remediat. Radioact . Waste Manag. Liverpool, UK, 2009.
8 Bellatreccia, F., Della Ventura, G., Caprilli, E., Williams, C.T., and Parodi, G.C., “Crystal-chemistry of zirconolite and calzirtite from Jacupiranga, Sao Paulo (Brazil),” Mineral. Mag., 63 [5] 649660 (1999).
9 Clinard, F.W., Foltyn, E.M., and Ewing, R.C., “Stored energy in natural zirconolite and its synthetic counterpart after alpha recoil self-irradiation damage,” J. Nucl. Mater., 185 202207 (1991).
10 Maddrell, E., Thornber, S., and Hyatt, N.C., “The influence of glass composition on crystalline phase stability in glass-ceramic wasteforms,” J. Nucl. Mater., 456 461466 (2015).
11 Trachenko, Koystya, Dove, Martin T, and Salje, Ekhard K H, “Large swelling and percolation in irradiated zircon,” J. Phys. Condens. Matter, 15 L1L7 (2003).
12 Ewing, R.C., Weber, W.J., and Clinard, F.W., “Radiation effects in nuclear waste forms for high-level radioactive waste,” Prog. Nucl. Energy, 29 [2] 63127 (1995).



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