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Redox phenomena controlling systemsActivity Code: Fission-2007-1.1.1
Coordinator:Karlsruher Institut für Technolgie (KIT)


Main objectives of ReCosy are the sound understanding of redox phenomena controlling the long-term release/retention of radionuclides in nuclear waste disposal and providing tools to apply the results to Performance Assessment/Safety Case. Although redox is not a new geochemical problem, different questions are still not resolved and thus raised by implementers and scientists. From a top-down approach, the reliability of redox measurements for site characterization, redox disturbances by the near-field materials, changes induced by glaciation scenarios or the redox buffer capacity of host-rocks and the kinetics of response to redox perturbations are addressed.

From a bottom-up approach, questions concerning the interpretation of mixed potentials, surface mediated reactions, redox states of actinides and long-lived fission products, the source term of spent nuclear fuel in the presence of corroding steel as well as the role of microbes and biofilms on the evolution of the redox state are tackled. Radionuclide redox transformations on minerals are decisive scenarios in the NEA FEP list and in the RETROCK project. In the large FP 6 IPs NF-PRO and FUNMIG, redox phenomena controlling the retention of radionuclides were addressed, although not systematically considered.

Project Details:

Start Date: 01.04.2008
End Date: 30.04.2011
EU Contribution: 1.46 Mio. Euro
Total Costs: 1.91 Mio. Euro
Funding Scheme: Small or medium-scale focused research project
Administrative Contact Person:
Gunnar Buckau, gunnar.buckau@kit.edu
Project Website:


  • Karlsruhe Institute of Technology (KIT), Germany
  • Association pour la Recherche et le Dévelop­pement des Méthodes et Processus Industriels, France
  • Bureau de Recherches Geologiques et Minieres, France
  • Commissariat à l'Énergie Atomique, France
  • Chalmers University of Technology, Sweden
  • CTM Centre Tecnològic, Spain
  • AMPHOS XXI Consulting, Spain
  • Forschungszentrum Dresden-Rossen­dorf, Germany
  • Gesellschaft für Anlagen- und Reaktor­sicherheit mbH, Germany
  • University of Helsinki, Finland
  • Joint Research Centre – Institute for Trans­uranium Elements, Belgium
  • Nuclear Research Institute Rez plc, Czech Republic
  • Paul Scherrer Institut, Switzerland
  • Graz University of Technology, Austria
  • University of Potsdam, Physical Chemistry, Germany
  • Centre National de la Recherche Scientifique, France
  • University of Zaragoza, Spain
  • Studsvik AB, Sweden
  • Institute of Isotopes - Hungarian Academy of Sciences, Hungary
  • University of Cyprus, Cyprus
  • Institute of Physics, Lithuania
  • University of Utrecht, Netherlands
  • Royal Institute of Technology, Sweden
  • Microbial Analytics Sweden AB, Sweden
  • LQC S.L., Spain
  • Geopoint AB, Sweden
  • Moscow State University, Russian Federation
  • Svensk Kärnbränslehantering AB, Sweden
  • Agence national pour la gestion des déchets radioactifs, France

  • Posiva Oy, Finland

  • University of Loughborough, United Kingdom

  • University of Manchester, United Kingdom