First-order model for durability of Hanford waste glasses as a function of composition

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Two standard chemical durability tests, the static leach test MCC-1 and product consistency test PCT, were conducted on simulated borosilicate glasses that encompass the expected range of compositions to be produced in the Hanford Waste Vitrification Plant (HWVP). A first-order empirical model was fitted to the data from each test method. The results indicate that glass durability is increased by addition of Al{sub 2}O{sub 3}, moderately increased by addition of ZrO{sub 2} and SiO{sub 2}, and decreased by addition of Li{sub 2}O, Na{sub 2}O, B{sub 2}O{sub 3}, and MgO. Addition of Fe{sub 2}O{sub 3} and CaO produce an indifferent or ... continued below

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Pages: (17 p)

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Hrma, P.; Piepel, G.F.; Schweiger, M.J. & Smith, D.E. April 1, 1992.

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Description

Two standard chemical durability tests, the static leach test MCC-1 and product consistency test PCT, were conducted on simulated borosilicate glasses that encompass the expected range of compositions to be produced in the Hanford Waste Vitrification Plant (HWVP). A first-order empirical model was fitted to the data from each test method. The results indicate that glass durability is increased by addition of Al{sub 2}O{sub 3}, moderately increased by addition of ZrO{sub 2} and SiO{sub 2}, and decreased by addition of Li{sub 2}O, Na{sub 2}O, B{sub 2}O{sub 3}, and MgO. Addition of Fe{sub 2}O{sub 3} and CaO produce an indifferent or reducing effect on durability according to the test method. This behavior and a statistically significant lack of fit are attributed to the effects of multiple chemical reactions occurring during glass-water interaction. Liquid-liquid immiscibility is suspected to be responsible for extremely low durability of some glasses.

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Pages: (17 p)

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OSTI; NTIS; INIS; GPO Dep.

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  • International high level radioactive waste management (IHLRWM) conference: promoting understanding through education and communication, Las Vegas, NV (United States), 12-16 Apr 1992

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  • Other: DE92012563
  • Report No.: PNL-SA-20362
  • Report No.: CONF-920430--79
  • Grant Number: AC06-76RL01830
  • Office of Scientific & Technical Information Report Number: 5538891
  • Archival Resource Key: ark:/67531/metadc1093399

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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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  • April 1, 1992

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  • Feb. 10, 2018, 10:06 p.m.

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  • April 20, 2018, 12:37 p.m.

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Hrma, P.; Piepel, G.F.; Schweiger, M.J. & Smith, D.E. First-order model for durability of Hanford waste glasses as a function of composition, article, April 1, 1992; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc1093399/: accessed October 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.