Candidate glass–ceramic wasteforms for the immobilisation of Cs-loaded IONSIV® wastes: a scoping study
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Date
2024-03-28
Journal Title
Journal ISSN
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Publisher
Springer Nature
Abstract
In some cases, nuclear wastes can be treated with ion exchange materials to remove specific radionuclides from solution via cationic exchange. A promising inorganic ion exchange material, crystalline silicotitanate (CST) or IONSIV®, has been previously employed to remove Cs-137 from contaminated aqueous systems with high specificity. Once the radioactive Cs-137 has been incorporated within the IONSIV® structure, the ion exchange material itself becomes radioactive waste and requires immobilisation within a nuclear wasteform. The current scoping study investigated design and development of advanced glass–ceramic wasteforms for the immobilisation of Cs-loaded IONSIV®. Two well-established Cs-bearing ceramic phases, hollandite, and pollucite, were considered as the ceramic component of the novel glass–ceramic design. Hollandite appeared to react with the borosilicate glass-component to form celsian and rutile. The pollucite system produced a phase assemblage of pollucite, rutile, srilankite, and glass, as targeted, and is therefore considered a promising wasteform design for Cs-loaded IONSIV® material. © 2024 Springer Nature.
Description
Keywords
Glass, Ceramics, Wastes, Cesium, Nuclear materials management, Crystals, Inorganic compounds, Ion Exchange materials, Radioactive wastes, Pollucite, Contamination, Spent fuel storage
Citation
Bahmanrokh, G., Whitelock, E., Dayal, P., Farzana, R., Koshy, P., & Gregg, D. J. (2024). Candidate glass–ceramic wasteforms for the immobilisation of Cs-loaded IONSIV® wastes: a scoping study. MRS Advances, 9(7), 420-425. doi:10.1557/s43580-024-00830-3