Influence of Na-Al-Fe-P glass alteration in hot non-saturated vapor on leaching of vitrified radioactive wastes in water
Abstract
Influence of preliminary heating in vapor on leaching of Na-Al-P-glass in water is investigated. The glass simulates industrial waste forms for solidification of high level liquid radioactive wastes used in Russia. Heating up to 300 °C in unsaturated vapor leads to transformation (devitrification) of pristine glass into four separate crystalline phases. The alteration takes place in whole volume of the monolithic glass sample. Experiments on leaching of altered and pristine glass in water are carried out. A ratio of estimated leaching rates of the altered and pristine glass can exceed two orders of magnitude. Fractions of radionuclide simulators in colloid of different size in leaching products are determined.
- Publication:
-
Journal of Nuclear Materials
- Pub Date:
- September 2018
- DOI:
- 10.1016/j.jnucmat.2018.05.025
- Bibcode:
- 2018JNuM..508..212M
- Keywords:
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- Na-Al-Fe-P glass;
- ICP;
- SEM;
- Vapor devitrification;
- Colloid