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Preparation and characterization of vitrified glass matrix for high level waste from MOX fuel processing

Authors
Journal
Journal of Non-Crystalline Solids
0022-3093
Publisher
Elsevier
Publication Date
Volume
353
Identifiers
DOI: 10.1016/j.jnoncrysol.2007.07.013
Keywords
  • Chemical Durability
  • X-Ray Diffraction
  • Glass Melting
  • Glass Formation
  • Glass Transition
  • Glasses
  • Scanning Electron Microscopy
  • Nuclear And Chemical Wastes
  • Ftir Measurements
  • Oxide Glasses
  • Borosilicates
Disciplines
  • Chemistry

Abstract

Abstract The fuels used in first generation advanced heavy water reactor (AHWR) are mixed oxides (MOX) of 238U– 239Pu and 232Th– 233U. The reprocessing of spent MOX fuel and partitioning of minor actinides from waste generate high level waste (HLW) raffinates. Sodium borosilicate glass matrix was developed for immobilization of simulated HLW raffinate. Waste oxide loadings upto 25 wt% was achieved. The matrix was studied for physico-chemical characteristics like processing temperature, density, microhardness and chemical durability. The glass transition temperatures were estimated by differential scanning calorimeter (DSC). Homogeneity and glass structure was analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infra red (FTIR) spectroscopy. The detailed data on preparation and characterization of the glasses are presented.

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