Sorption and transport of uranium on Hematite milestone

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Transport of radionuclides that escape failed waste packages (WP) may be significantly affected by interaction with the alteration products derived from the WP components and other construction materials. The interaction of WP`s and other ferrous metal materials with groundwater prior to failure is expected to result in the formation of iron oxides (Viani, 1996). These phases are expected to significantly retard U and Np, radionuclides that are not strongly retarded by the repository horizon and the surrounding rocks (Meijer, 1990). Because sorption of radionuclides onto iron oxides is strongly dependent on fluid composition (e.g.; pH and dissolved carbon), mechanistic models ... continued below

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15 p.

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Viani, B., LLNL February 3, 1998.

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Description

Transport of radionuclides that escape failed waste packages (WP) may be significantly affected by interaction with the alteration products derived from the WP components and other construction materials. The interaction of WP`s and other ferrous metal materials with groundwater prior to failure is expected to result in the formation of iron oxides (Viani, 1996). These phases are expected to significantly retard U and Np, radionuclides that are not strongly retarded by the repository horizon and the surrounding rocks (Meijer, 1990). Because sorption of radionuclides onto iron oxides is strongly dependent on fluid composition (e.g.; pH and dissolved carbon), mechanistic models that capture the detailed chemistry and physics that control transport must validated before credible predictions of the effects of WP alteration products can be made, and before limits on radionuclide transport through the engineered barrier system (EBS) can be placed. Reactive transport models that couple sorption models to fluid flow models are also required to assess the ability of more simplistic PA models to capture the essential features of the transport process. This letter report presents results of sorption and transport experiments that are designed to obtain parameters to be used in coupled models and to test the ability of these models to predict transport.

Physical Description

15 p.

Notes

OSTI as DE98058726

Other: FDE: PDF; PL:

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  • Other Information: PBD: 3 Feb 1998

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  • Other: DE98058726
  • Report No.: UCRL-ID--129848
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/664593 | External Link
  • Office of Scientific & Technical Information Report Number: 664593
  • Archival Resource Key: ark:/67531/metadc710692

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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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  • February 3, 1998

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • April 10, 2017, 1:46 p.m.

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Viani, B., LLNL. Sorption and transport of uranium on Hematite milestone, report, February 3, 1998; California. (digital.library.unt.edu/ark:/67531/metadc710692/: accessed June 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.