Parametric effects on glass reaction in the unsaturated test method

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The Unsaturated Test Method has been applied to study glass reaction under conditions that may be present at the potential Yucca Mountain site, currently under evaluation for storage of reprocessed high-level nuclear waste. The results from five separate sets of parametric experiments are presented wherein test parameters ranging from water contact volume to sensitization of metal in contact with the glass were examined. The most significant effect was observed when the volume of water, as controlled by the water inject volume and interval period, was such to allow exfoliation of reacted glass to occur. The extent of reaction was also ... continued below

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130 p.

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Woodland, A.B.; Bates, J.K. & Gerding, T.J. December 1, 1991.

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Description

The Unsaturated Test Method has been applied to study glass reaction under conditions that may be present at the potential Yucca Mountain site, currently under evaluation for storage of reprocessed high-level nuclear waste. The results from five separate sets of parametric experiments are presented wherein test parameters ranging from water contact volume to sensitization of metal in contact with the glass were examined. The most significant effect was observed when the volume of water, as controlled by the water inject volume and interval period, was such to allow exfoliation of reacted glass to occur. The extent of reaction was also influenced to a lesser extent by the degree of sensitization of the 304L stainless steel. For each experiment, the release of cations from the glass and alteration of the glass were examined. The major alteration product is a smectite clay that forms both from precipitation from solution and from in-situ alteration of the glass itself. It is this clay that undergoes exfoliation as water drips from the glass. A comparison is made between the results of the parametric experiments with those of static leach tests. In the static tests the rates of release become progressively reduced through 39 weeks while, in contrast, they remain relatively constant in the parametric experiments for at least 300 weeks. This differing behavior may be attributable to the dripping water environment where fresh water is periodically added and where evaporation can occur.

Physical Description

130 p.

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INIS; OSTI as DE92007578

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  • Other Information: PBD: Dec 1991

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  • Other: DE92007578
  • Report No.: ANL--91/36
  • Grant Number: W-31109-ENG-38
  • DOI: 10.2172/138367 | External Link
  • Office of Scientific & Technical Information Report Number: 138367
  • Archival Resource Key: ark:/67531/metadc623771

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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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  • December 1, 1991

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • Dec. 15, 2015, 6:14 p.m.

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Woodland, A.B.; Bates, J.K. & Gerding, T.J. Parametric effects on glass reaction in the unsaturated test method, report, December 1, 1991; Illinois. (digital.library.unt.edu/ark:/67531/metadc623771/: accessed October 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.