Colloid formation during waste glass corrosion

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The long-term behavior of nuclear waste glass in a geologic repository may require a technical consideration of the role of colloids in the release and transport of radionuclides. The neglect of colloidal properties in assessing the near- and far-field migration behavior of actinides may lead to significant underestimates and poor predictions of biosphere exposure from high-level waste (HLW) disposal. Existing data on colloid-facilitated transport suggests that radionuclide migration may be enhanced, but the importance of colloids is not adequately assessed. Indeed, the occurrence of radionuclide transport, attributed to colloidal species, has been reported at Mortandad Canyon, Los Alamos and at ... continued below

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3 p.

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Mertz, C.J.; Buck, E.C.; Fortner, J.A. & Bates, J.K. May 1, 1996.

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Description

The long-term behavior of nuclear waste glass in a geologic repository may require a technical consideration of the role of colloids in the release and transport of radionuclides. The neglect of colloidal properties in assessing the near- and far-field migration behavior of actinides may lead to significant underestimates and poor predictions of biosphere exposure from high-level waste (HLW) disposal. Existing data on colloid-facilitated transport suggests that radionuclide migration may be enhanced, but the importance of colloids is not adequately assessed. Indeed, the occurrence of radionuclide transport, attributed to colloidal species, has been reported at Mortandad Canyon, Los Alamos and at the Nevada Test Site; both unsaturated regions are similar to the proposed HLW repository at Yucca Mountain. Although some developments have been made on understanding the transport characteristics of colloids, the characterization of colloids generated from the corrosion of the waste form has been limited. Colloids are known to incorporate radionuclides either from hydrolysis of dissolved species (real colloids) or from adsorption of dissolved species onto existing groundwater colloids (pseudocolloids); however, these colloids may be considered secondary and solubility limited when compared to the colloids generated during glass alteration.

Physical Description

3 p.

Notes

INIS; OSTI as DE96009460

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  • National Academy of Sciences (NAS) on glass as a waste form and vitrification technology: an international workshop, Washington, DC (United States), 13 May 1996

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  • Other: DE96009460
  • Report No.: ANL/CMT/CP--89924
  • Report No.: CONF-9605162--3
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 230389
  • Archival Resource Key: ark:/67531/metadc669957

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  • May 1, 1996

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  • June 29, 2015, 9:42 p.m.

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  • Dec. 15, 2015, 6:52 p.m.

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Mertz, C.J.; Buck, E.C.; Fortner, J.A. & Bates, J.K. Colloid formation during waste glass corrosion, article, May 1, 1996; Illinois. (digital.library.unt.edu/ark:/67531/metadc669957/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.