Evaluation of glass as a matrix for solidifying Savannah River Plant waste: properties of glasses containing Li/sub 2/O

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Properties of waste forms made of borosilicate glass containing Li/sub 2/O combined with both simulated and actual Savannah River Plant (SRP) waste sludges were studied. The glass former, Frit 21, is presently the leading candidate for vitrifying SRP waste in a proposed process for long-term waste management. Devitrification of waste forms was inhibited by sludge components uranium and nickel, but was promoted by aluminum. Devitrification increased the leach rate of waste forms containing simulated sludges up to a factor of 20 in high-temperature leach tests and could be qualitatively correlated with the leach rate of waste forms containing actual sludges ... continued below

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Pages: 41

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Plodinec, M.J. & Wiley, J.R. February 1, 1979.

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Description

Properties of waste forms made of borosilicate glass containing Li/sub 2/O combined with both simulated and actual Savannah River Plant (SRP) waste sludges were studied. The glass former, Frit 21, is presently the leading candidate for vitrifying SRP waste in a proposed process for long-term waste management. Devitrification of waste forms was inhibited by sludge components uranium and nickel, but was promoted by aluminum. Devitrification increased the leach rate of waste forms containing simulated sludges up to a factor of 20 in high-temperature leach tests and could be qualitatively correlated with the leach rate of waste forms containing actual sludges in room temperature tests. Room temperature leach rates were diffusion controlled throughout a 100-day test. Although sulfate solubility in Frit 21-sludge melts could be raised from 1 wt % to 2.5 wt % by slight modifications of the frit, this should not be necessary since Na/sub 2/SO/sub 4/ washes from actual sludges to levels below 0.5 wt %. It was demonstrated that waste forms can be dissolved in boiling 5M HNO/sub 3/ if waste recovery becomes necessary. 13 figures, 12 tables.

Physical Description

Pages: 41

Notes

Dep. NTIS, PC A03/MF A01.

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  • Report No.: DP-1498
  • Grant Number: EY-76-C-09-0001
  • DOI: 10.2172/6190422 | External Link
  • Office of Scientific & Technical Information Report Number: 6190422
  • Archival Resource Key: ark:/67531/metadc1105928

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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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  • February 1, 1979

Added to The UNT Digital Library

  • Feb. 22, 2018, 7:45 p.m.

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  • March 23, 2018, 2:11 p.m.

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Plodinec, M.J. & Wiley, J.R. Evaluation of glass as a matrix for solidifying Savannah River Plant waste: properties of glasses containing Li/sub 2/O, report, February 1, 1979; United States. (digital.library.unt.edu/ark:/67531/metadc1105928/: accessed April 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.