Phosphate-based glasses and glass ceramics for immobilization of lanthanides and actinidesстатья

Статья опубликована в высокорейтинговом журнале

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Дата последнего поиска статьи во внешних источниках: 20 мая 2019 г.

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[1] Phosphate-based glasses and glass ceramics for immobilization of lanthanides and actinides / S. V. Stefanovsky, O. I. Stefanovsky, S. S. Danilov, M. I. Kadyko // Ceramics International. — 2019. — Vol. 45. — P. 9331–9338. Borosilicate glasses used to be a choice to vitrify nuclear wastes in most of the countries. However, Russian HLW vitrification plant at the Mayak Production Association (Chelyabinsk Region, Urals) uses phosphate-based glasses. Initially, Russian HLW glasses were based on sodium-aluminophosphate with the following approximate composition(mol.%): 40 Na2O, 20 Al2O3, 40 P2O5. Recently we have modified this composition by replacing of up to 50% Al2O3 with Fe2O3. Such replacement increases chemical durability and resistance to devitrification and radiation of the glasses. The phase composition and structure of these glasses containing ∼ 10 wt% RE oxides and ∼ 10, ∼ 50, and ∼ 100 wt% UO3 (over 100 wt%) were studied in details using XRD and FTIR. Glasses and glass-ceramics have high chemical durability. Thus, the glasses and glass ceramics on sodium-aluminum-ironphosphate basis are good waste forms for lanthanide fraction of HLW generated at spent nuclear fuel pyroprocessing and minor actinides. [ DOI ]

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