Control of Nepheline Crystallization in Nuclear Waste Glass

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Glass frits with a high B{sub 2}O{sub 3} concentration have been designed which, when combined with high-alumina concentration nuclear waste streams, will form glasses with durabilities that are acceptable for repository disposal and predictable using a free energy of hydration model. Two glasses with nepheline discriminator values closest to 0.62 showed significant differences in normalized boron release between the quenched and heat treated versions of each glass. X-ray diffraction confirmed that nepheline crystallized in the glass with the lowest nepheline discriminator value, and nepheline may also exist in the second glass as small nanocrystals. The high-B{sub 2}O{sub 3} frit was ... continued below

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666-673

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Fox, Kevin July 1, 2008.

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Glass frits with a high B{sub 2}O{sub 3} concentration have been designed which, when combined with high-alumina concentration nuclear waste streams, will form glasses with durabilities that are acceptable for repository disposal and predictable using a free energy of hydration model. Two glasses with nepheline discriminator values closest to 0.62 showed significant differences in normalized boron release between the quenched and heat treated versions of each glass. X-ray diffraction confirmed that nepheline crystallized in the glass with the lowest nepheline discriminator value, and nepheline may also exist in the second glass as small nanocrystals. The high-B{sub 2}O{sub 3} frit was successful in producing simulated waste glasses with no detectable nepheline crystallization at waste loadings of up to 45 wt%. The melt rate of this frit was also considerably better than other frits with increased concentrations of Na{sub 2}O.

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666-673

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  • Journal Name: International Journal of Applied Ceramic Chemistry; Journal Volume: 5; Journal Issue: 6

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  • Report No.: WSRC-STI-2006-00379
  • Grant Number: DE-AC09-96SR18500
  • DOI: 10.1111/j.1744-7402.2008.02250.x | External Link
  • Office of Scientific & Technical Information Report Number: 941103
  • Archival Resource Key: ark:/67531/metadc898477

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • July 1, 2008

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  • Sept. 27, 2016, 1:39 a.m.

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  • Nov. 23, 2016, 11:33 a.m.

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Fox, Kevin. Control of Nepheline Crystallization in Nuclear Waste Glass, article, July 1, 2008; Aiken, South Carolina. (digital.library.unt.edu/ark:/67531/metadc898477/: accessed October 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.