Contact

Dr. Katharina Müller
Head Surface Processes
k.muellerAthzdr.de
Phone: +49 351 260 2439

Behavior of long-lived fission and activation products in the near-field of a repository for nuclear waste and possibilities of their retention (VESPA II)


Financed by:
Federal Ministry for Economic Affairs and Energy (02 E 11607B)
Funding period:
2017/09/01 – 2020/08/31
Cooperation Partner:
Karlsruhe Institute for Technology, Institute for Nuclear Waste Disposal (KIT-INE, Karlsruhe, Germany)
Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) GmbH (Braunschweig, Germany)
Institut für Energie- und Klimaforschung Nukleare Entsorgung und Reaktorsicherheit (IEK-6, Jülich, Germany)
People:
N. Mayordomo, D. Rodríguez (PhD student), K. Müller (project leader)


Summary

Long-term safety assessments for final disposals of high-level radioactive waste have to consider the release of radionuclides from the waste and their potential retention by the multi-barrier system. To date, it has been assumed in long-term safety analysis that there is only retention for cationic but not for anionic species within the near field of final disposals.

In this context, the joint research project VESPA II, has the primary objective to investigate the retention of 79Se, 129I and 99Tc. In aquatic solutions, these elements mainly occur in anionic form and do not form poorly soluble phases. The goals of VESPA II are:

  1. filling the gaps on the reported thermodynamic data related to fission products and
  2. analyzing their retention by minerals phases likely found in the nearfield repository, such as corrosion products.

HZDR is involved in the following work packages

  1. studying the surface speciation and incorporation of Tc(VII) and Tc(IV) on iron corrosion phases, environmental ubiquitous minerals and on LDH phases under reducing conditions and
  2. investigating the Tc chemistry and thermodynamics, especially for low oxidation states.

KIT      GRS      FZ Jülich      BMWi
Disposal of nuclear waste in host rock formations featuring high-saline solutions – Implementation of a thermodynamic reference database (THEREDA)
Moog, H. C.; Bok, F.; Marquardt, C. M.; Brendler, V.;

Conference contributions (Oral presentations and posters):

Thermodynamic Reference Database - Recent and present activities in THEREDA
Moog, H. C.; Bok, F.; Marquardt, C.; Thoenen, T.; Voigt, W.; Yalçintaş, E.;
  • Lecture (Conference)
    GTT Users' Meeting 2018, 27.-29.06.2018, Herzogenrath-Kohlscheid, Deutschland

THEREDA, the thermodynamic reference database for a nuclear waste disposal in Germany
Bok, F.; Moog, H. C.; Altmaier, M.; Voigt, W.; Thoenen, T.;
  • Poster
    Goldschmidt2018, 12.-17.08.2018, Boston, USA

Thermodynamic modelling of Selenium in environmental conditions: traps, pitfalls and perspectives
Bok, F.; Jordan, N.; Brendler, V.;
  • Lecture (Conference)
    256th ACS National Meeting & Exposition, 19.-23.08.2018, Boston, USA

Mechanistic models for uranium sorption on iron minerals: Comparing their parametrization and surface species
Bok, F.; Richter, A.; März, J.; Brendler, V.;
  • Lecture (Conference)
    255th ACS National Meeting & Exposition, 18.-22.03.2018, New Orleans, LA, USA

Building a reference database for thermodynamic sorption modelling
Bok, F.; Richter, A.; Brendler, V.;
  • Lecture (Conference)
    254th ACS National Meeting, 20.-24.08.2017, Washington, DC, USA

THEREDA – Thermodynamic Reference Database
Moog, H. C.; Altmaier, M.; Bok, F.; Brendler, V.; Gaona, X.; Marquardt, C.; Montoya, V.; Richter, A.; Scharge, T.; Thoenen, T.; Voigt, W.; Yalçintaş, E.;
  • Lecture (Conference)
    ENTRIA Conference, 26.-28.09.2017, Braunschweig, Deutschland

Recent and present activities in THEREDA
Moog, H. C.; Altmaier, M.; Brendler, V.; Bok, F.; Gaona, X.; Marquardt, C.; Richter, A.; Scharge, T.; Thoenen, T.; Voigt, W.;
  • Lecture (Conference)
    Actinide Brine Chemistry (ABC-Salt V Workshop 2017), 26.-28.03.2017, Ruidoso, USA

THEREDA –Thermodynamic Reference Database for the Nuclear Waste Disposal in Germany
Bok, F.; Moog, H. C.; Altmaier, M.; Voigt, W.; Thoenen, T.;
  • Lecture (Conference)
    21. European Conference on Thermophysical Properties, 03.-08.09.2017, Graz, Österreich

THEREDA, the thermodynamic reference database for a nuclear waste disposal in Germany
Bok, F.; Moog, H. C.; Altmaier, M.; Voigt, W.; Thoenen, T.;
  • Poster
    17 International Symposium on Solubility Phenomena and Related Equilibrium Processes (ISSP17), 24.-29.07.2016, Geneva, Schweiz

Oxygen solubility modelling in water and brines
Bok, F.; Moog, Helge C.;
  • Lecture (Conference)
    17 International Symposium on Solubility Phenomena and Related Equilibrium Processes (ISSP17), 24.-29.07.2016, Geneva, Schweiz

A new set of Pitzer parameters for dissolved oxygen and its implication on the U(IV)/U(VI) system.
Bok, F.; Richter, A.; Brendler, V.; Altmaier, M.;
  • Lecture (Conference)
    Workshop on Actinide-Brine-Chemistry (ABC-Salt 4), 14.-15.04.2015, Heidelberg, Deutschland

THEREDA - added value to contaminant speciation in brines
Bok, F.; Richter, A.; Brendler, V.;
  • Poster
    International Symposium on Solubility Phenomena and Related Equilibrium Processes (ISSP), 21.-25.07.2014, Karlsruhe, Deutschland

THEREDA revisited – project status in 2013
Brendler, V.; Bok, F.; Marquardt, C.; Altmaier, M.;
  • Poster
    MIGRATION conference 2013, 08.-13.09.2013, Brighton, United Kingdom

THEREDA – Thermodynamic Reference Database
Moog, H. C.; Bok, F.;
  • Lecture (Conference)
    Goldschmidt2013, 25.-30.08.2013, Florence, Italy
  • Open Access LogoAbstract in refereed journal
    Mineralogical Magazine 77(2013)5, 1783-1783
    DOI: 10.1180/minmag.2013.077.5.13

A comparison of Pitzer databases for nuclear waste disposal modelling
Bok, F.; Richter, A.; Brendler, V.;
  • Poster
    Goldschmidt2013, 25.-30.08.2013, Florence, Italy
  • Open Access LogoAbstract in refereed journal
    Mineralogical Magazine 77(2013)5, 730-730
    DOI: 10.1180/minmag.2013.077.5.2

A brief comparison of Pitzer databases for nuclear waste disposal modeling
Bok, F.; Voigt, W.; Bube, C.; Wilhelm, S.; Moog, H.;
  • Lecture (Conference)
    Actinide and Brine Chemistry in a Salt Repository Workshop (III), 15.-17.04.2013, Santa Fe, USA

THEREDA – A thermodynamic database for increasing confidence in waste disposal
Richter, A.; Bok, F.; Brendler, V.;
  • Abstract in refereed journal
    Mineralogical Magazine 76(2012), 2283
  • Lecture (Conference)
    Goldschmidt 2012, 24.-29.06.2012, Montreal, Canada

THEREDA - One Database for thermodynamic and sorption data
Bok, F.; Brendler, V.; Richter, A.;
  • Poster
    Experimental Mineralogy Petrology and Geochemistry 2012, 04.-07.03.2012, Kiel, Deutschland
  • Contribution to proceedings
    Experimental Mineralogy Petrology and Geochemistry 2012, 04.-07.03.2012, Kiel, Deutschland
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Contact

Dr. Katharina Müller
Head Surface Processes
k.muellerAthzdr.de
Phone: +49 351 260 2439