Balencie, J. and Burger, Didier and Rehspringer, Jean Luc and Estournès, Claude and Vilminot, Serge and Richard-Plouet, Mireille and Boos, Anne Perlite for permanent confinement of cesium. (2006) Journal of Nuclear Materials, vol. 3 (n° 1-3). pp. 196-201. ISSN 0022-3115
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Official URL: http://dx.doi.org/10.1016/j.jnucmat.2006.02.054
We present the potential use of expanded perlite, a metastable amorphous hydrated aluminium silicate, as a permanent medium for the long-term confinement of cesium. The method requires simply a loading by mixing an aqueous cesium nitrate solution and expanded perlite at 300 K followed by densification by sintering. The formation of pollucite, CsAlSi2O6, a naturally occurring mineral phase, upon careful heat treatment is demonstrated by X-ray diffraction. Leaching tests on the resulting glass-ceramics reveal a very low Cs departure of 0.5 mg m−2 d−1.
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