Natural analogues of nuclear waste glass corrosion.

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This report reviews and summarizes studies performed to characterize the products and processes involved in the corrosion of natural glasses. Studies are also reviewed and evaluated on how well the corrosion of natural glasses in natural environments serves as an analogue for the corrosion of high-level radioactive waste glasses in an engineered geologic disposal system. A wide range of natural and experimental corrosion studies has been performed on three major groups of natural glasses: tektite, obsidian, and basalt. Studies of the corrosion of natural glass attempt to characterize both the nature of alteration products and the reaction kinetics. Information available ... continued below

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Medium: P; Size: 189 pages

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Abrajano, T.A. Jr.; Ebert, W.L. & Luo, J.S. January 6, 1999.

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Description

This report reviews and summarizes studies performed to characterize the products and processes involved in the corrosion of natural glasses. Studies are also reviewed and evaluated on how well the corrosion of natural glasses in natural environments serves as an analogue for the corrosion of high-level radioactive waste glasses in an engineered geologic disposal system. A wide range of natural and experimental corrosion studies has been performed on three major groups of natural glasses: tektite, obsidian, and basalt. Studies of the corrosion of natural glass attempt to characterize both the nature of alteration products and the reaction kinetics. Information available on natural glass was then compared to corresponding information on the corrosion of nuclear waste glasses, specifically to resolve two key questions: (1) whether one or more natural glasses behave similarly to nuclear waste glasses in laboratory tests, and (2) how these similarities can be used to support projections of the long-term corrosion of nuclear waste glasses. The corrosion behavior of basaltic glasses was most similar to that of nuclear waste glasses, but the corrosion of tektite and obsidian glasses involves certain processes that also occur during the corrosion of nuclear waste glasses. The reactions and processes that control basalt glass dissolution are similar to those that are important in nuclear waste glass dissolution. The key reaction of the overall corrosion mechanism is network hydrolysis, which eventually breaks down the glass network structure that remains after the initial ion-exchange and diffusion processes. This review also highlights some unresolved issues related to the application of an analogue approach to predicting long-term behavior of nuclear waste glass corrosion, such as discrepancies between experimental and field-based estimates of kinetic parameters for basaltic glasses.

Physical Description

Medium: P; Size: 189 pages

Notes

INIS; OSTI as DE00012000

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  • Other Information: PBD: 6 Jan 1999

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  • Report No.: ANL-98/22
  • Grant Number: W-31109-ENG-38
  • DOI: 10.2172/12000 | External Link
  • Office of Scientific & Technical Information Report Number: 12000
  • Archival Resource Key: ark:/67531/metadc625099

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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.

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  • January 6, 1999

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • March 30, 2016, 6:59 p.m.

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Abrajano, T.A. Jr.; Ebert, W.L. & Luo, J.S. Natural analogues of nuclear waste glass corrosion., report, January 6, 1999; Illinois. (digital.library.unt.edu/ark:/67531/metadc625099/: accessed October 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.