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Theoretical and practical possibility to stabilize 137 Cs(Na)-bearing liquid radioactive waste in mineral-like forms which are geochemically compatible with granithoids in its long-term disposal was demonstrated. Perforated cenospheres ( SiO 2 /Al 2 O 3 =3.4) of fly ash generated from combustion of kuznetskii coal was used as an aluminosilicate precursor. It was established that solidification of Cs-bearing solutions at 750-1100 ° С via the proposed route resulted in glass-crystalline compounds incorporating 53-79 wt. % pollucite with the Cs leaching rate being by 2-3 order of magnitude lower than the standard parameter accepted in Russia for solidified high level waste.

Solidification of Cs-137-Bearing Radioactive Waste in Cenosphere-Based Mineral-Like Hosts for Long-Term Disposal in Granithoids