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Remediation of Uranium- and CHC-Contaminated Groundwater on a Former Nuclear Fuel-Element Production Site

[+] Author Affiliations
Jörg Wörner, Sonja Margraf

RD-Hanau, Hanau, Germany

Paper No. ICEM2009-16244, pp. 595-602; 8 pages
  • ASME 2009 12th International Conference on Environmental Remediation and Radioactive Waste Management
  • ASME 2009 12th International Conference on Environmental Remediation and Radioactive Waste Management, Volume 2
  • Liverpool, UK, October 11–15, 2009
  • Conference Sponsors: Nuclear Engineering Division and Environmental Engineering Division
  • ISBN: 978-0-7918-4408-3 | eISBN: 978-0-7918-3865-X
  • Copyright © 2009 by ASME


Since July 2002 a pump & treat remedial action has been in operation for the extraction of Uranium- and “CHC-compounds” contaminated ground-water flowing below an industrial area used before as production site for nuclear fuel elements. So far about 17 kg Uranium and 22 kg CHC-compounds have been eliminated. As described earlier [1] two ground-water plumes have transported the Uranium downstream to locations where two main remediation wells are placed. They show characteristic differences with respect to their Uranium-nuclide vector. More than 220.000 m3 ground-water of the whole 350.000 m3 have been pumped therefrom. Preferred ground-water paths cause blending the two plumes’ waters. The first plume’s water characterized by decreasing Uranium-235 ratios is meanwhile dominated by the second plume’s water of up to 85% in case of well W10. The overall activity of 122 MBq Uranium-235 has been extracted from the saturated zone with decreasing quantities. Only a small area remains where the first plume’s pure ground water will be extracted in future. Both target values of 20 μg/l and 10 μg/l for dissolved Uranium and CHC-compounds, respectively, could not yet be reached for all remediation wells. In accordance to the 10μSv-concept of radiation protection the improvement of specific parameters will still be necessary in order to release the complete site from the German Atomic Law.

Copyright © 2009 by ASME
Topics: Fuels , Uranium , Groundwater



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