Derivation of the Structural Integrity of Residual (SIR) glass model for the enhancement of waste loading. Issue 7 (31st March 2021)

• Record Type: Journal Article
• Authors: McClane, Devon L.; Amoroso, Jake W.; Hsieh, Madison C.; Fox, Kevin M.; Kruger, Albert A.
• Is Part Of: Journal of the American Ceramic Society. Volume 104:Issue 7(2021)
• Page Start: 3235
• Page End: 3246
• Publication Date: 2021-03-31
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.17768
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract: A new model based on glass structure to allow for enhanced waste loading in nuclear waste glass while maintaining chemical durability is proposed. The model is derived by splitting the molar concentrations of the targeted starting glass composition into theoretical crystalline phases anticipated to be observed during devitrification and a residual glass. An empirically derived relationship based on maintaining the residual glass structure, determined from a calculated non‐bridging oxygen content, was demonstrated to successfully screen glasses for acceptable durability. The proposed model can successfully identify durable glass compositions containing 20–35 wt% Al2 O3, a concentration that would significantly increase the projected waste loading in glasses processed at the Hanford Tank Waste Treatment and Immobilization Plant.