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Asphalt Emulsion Sealing of Uranium Mill Tailings

  • J. N. Hartley
  • P. L. Koehmstedt
  • D. J. Esterl
Part of the Advances in Nuclear Science & Technology book series (ANST)

Abstract

The use of asphalt emulsion to contain radon and radium in uranium tailings is being investigated at the Pacific Northwest Laboratory. Results of these studies indicate that a radon flux reduction of greater than 99% can be obtained using either a poured-on/sprayed-on seal (3.0 to 7.0 mm thick) or an admix seal (2.5 to 15.2 cm thick) containing about 18 wt % residual asphalt. A field test was carried out at the Grand Junction tailings pile in order to demonstrate the sealing process. A reduction in radon flux ranging from 4.5 to greater than 99% (76% average) was achieved using a 15.2 cm (6 in.) admix seal with a sprayed-on top coat. A hydrostatic stabilizer was used to apply the admix. This was followed by compaction to form the radon seal. Overburden was applied to provide a protective soil layer over the seal. Included in part of the overburden was a herbicide to prevent root penetration.

Keywords

Radon Emanation Radon Diffusion Asphalt Emulsion Pacific Northwest Laboratory Radon Flux 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    U. S. Nuclear Regulatory Commission, Draft Generic Environmental Impact Statement on Uranium Milling, NUREG-0511, Vol. 1 (1979).Google Scholar
  2. 2.
    P. L. Koehmstedt, J. N. Hartley and D. K. Davis, Use of Asphalt Emulsion Sealants to Contain Radon and Radium in Uranium Tailings, BNWL-2190, Pacific Northwest Laboratory, Richland, WA (1977).CrossRefGoogle Scholar
  3. 3.
    J. N. Hartley, P. L. Koehmstedt and D. J. Esteri, Asphalt Emulsion Sealing of Uranium Mill Tailings, (In progress) Pacific Northwest Laboratory, Richland, WA (1979).Google Scholar
  4. 4.
    J. N. Dybalski, The Chemistry of Asphalt Emulsion, presented at 55th Annual Meeting Transportation Research Board, (1976).Google Scholar

Copyright information

© Springer Science+Business Media New York 1980

Authors and Affiliations

  • J. N. Hartley
    • 1
  • P. L. Koehmstedt
    • 1
  • D. J. Esterl
    • 1
  1. 1.Battelle Pacific Northwest LaboratoryRichlandUSA

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