Leaching behaviour of and Cs disposition in a UMo powellite glass–ceramic
No Thumbnail Available
Date
2014-05
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract
A UMo powellite glass–ceramic designed by French workers to immobilise Mo-rich intermediate-level waste was found to be quite leach resistant in water at 90 °C with the dissolution of Cs, Mo, Na, B and Ca not exceeding 2 g/L in normalised PCT tests. 133Cs solid state nuclear magnetic resonance and scanning electron microscopy (SEM) showed the Cs to inhabit the glass phase. The microstructures were not greatly affected by cooling rates between 1 and 5 °C/min or by introducing 10 times as much Cs and Sr. Protracted leach tests at 90 °C showed surface alteration as evidenced by SEM and particularly transmission electron microscopy; the main alteration phase was a Zn aluminosilicate but several other alteration phases were evident. Voidage in the alteration layers was indicated from enhanced lifetimes in po sitron annihilation lifetime spectroscopy. © 2014, Elsevier B.V.
Description
Keywords
Ceramics, Electron microscopy, Leaching, Zinc, Nuclear magnetic resonance, Glass
Citation
Vance, E. R., Davis, J., Olufson, K., Gregg, D. J., Blackford, M. G., Griffiths, G. R., Farnan, J., Sullivan, J., Sprouster, D., Campbell, C., & Hughes, J. (2014). Leaching behaviour of and Cs disposition in a UMo powellite glass–ceramic. Journal of Nuclear Materials, 448(1–3), 325-329. doi:10.1016/j.jnucmat.2014.02.024