Contact

Prof. Dr. Vinzenz Brendler

Head of Department
Thermo­dynamics of Actinides
v.brendler@hzdr.de
Phone: +49 351 260 2430

orangener Pfeil http://www.smartkd-concept.de/

Smart-Kd in der Langzeitsicherheitsanalyse - Anwendungen (SMILE)

Financed by:
Federal Ministry of Economics and Energy (BMWi, 02E11668B)
Smart Kd Concept logo ©Copyright: Susan Britz (GRS)

Smart Kd Concept logo

Foto: Susan Britz (GRS)

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Period:
09/2018 – 02/2022
Cooperation partners:
  • Helmholtz-Zentrum Dresden - Rossendorf e.V. (HZDR) (coordinator),
  • Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH,
  • Karlsruhe Institute of Technology (KIT)
People:
  • V. Brendler (project leader),
  • J. Bezzina,
  • H. Brinkmann,
  • J. Neumann,
  • M. Schmidt,
  • M. Stockmann
Web page:

Short Project Description:

In 2008, a series of three subsequent research projects was initiated with the aim to develop a concept to describe sorption of radionuclides in transport models for performance assessment codes of deep geological repositories for nuclear waste as a transient process. This is necessary since environmental conditions are changing with time and space. Consequently, geochemical parameters for long-term safety relevant elements vary temporally and/or spatially. This can lead to significant changes in the sorption behavior of radionuclides. Originally developed in ESTRAL, the concept was then extended to more complex geochemical conditions in the following project WEIMAR and is now being further improved and tested in the most recent joint research project SMILE.

The sorption of relevant metal cations in their reduced tri- or tetravalent form onto natural and synthetic minerals will be investigated to fill gaps in thermodynamic databases. Besides batch sorption and titration experiments, advanced spectroscopic techniques, e.g. time-resolved laser-induced fluorescence spectroscopy (TRLFS), surface x-ray diffraction (crystal truncation rod/resonant anomalous x-ray reflectivityCTR/RAXR), attenuated total reflection Fourier-transform infrared spectroscopy (ATR FTIR) and UV-Vis, will be used to generate a process understanding on the molecular level. This is the prerequisite to deduce reliable surface complexation models and parameters, which in turn allow the calculation of smart Kd-matrices. Based on the comprehensive and updated database, large-scale calculations will be performed to predict the propagation of radioactive contaminants for two different sites in Germany.

Publications

Journal papers:

A comprehensive study of the sorption mechanism and thermodynamics of f-element sorption onto K-feldspar

Neumann, J.; Brinkmann, H.; Britz, S.; Lützenkirchen, J.; Bok, F.; Stockmann, M.; Brendler, V.; Stumpf, T.; Schmidt, M.

Conference contributions (Oral presentations and posters):

Smart Kd-concept as efficient approach to improve geochemistry in reactive transport modelling for repository safety assessment

Stockmann, M.; Noseck, U.; Flügge, J.; Gehrke, A.; Brendler, V.

  • Lecture (Conference)
    Tage der Standortauswahl 2021, 11.-12.02.2021, Freiberg, Deutschland

Sorption of trivalent actinides (Cm, Am) and their rare earth analogues (Lu, Y, Eu, Nd, La) onto orthoclase: Batch experiments, Time-Resolved Laser Fluorescence Spectroscopy (TRLFS) and Surface Complexation Modeling (SCM)

Brinkmann, H.; Neumann, J.; Britz, S.; Brendler, V.; Stumpf, T.; Schmidt, M.

Smart Kd-concept as efficient approach to improve geochemistry in reactive transport modelling

Stockmann, M.; Noseck, U.; Britz, S.; Flügge, J.; Becker, D.-A.; Brendler, V.

  • Lecture (others)
    International Workshop on "How to integrate geochemistry at affordable costs into reactive transport for large-scale systems", 05.-07.02.2020, Dresden, Germany

Effect of background electrolyte composition on the formation of Th(IV) nanoparticles on mica (001)

Neumann, J.; Qiu, C.; Hellebrandt, S.; Eng, P.; Skanthakumar, S.; Steppert, M.; Soderholm, L.; Stumpf, T.; Schmidt, M.

  • Poster
    GDCh Fachgruppentagung Nuklearchemie, 25.-27.09.2019, Dresden, Deutschland

Effect of Background Electrolyte Composition on the Interfacial Formation of Th(IV) Nanoparticles

Neumann, J.; Qiu, C.; Hellebrandt, S.; Eng, P.; Skanthakumar, S.; Steppert, M.; Soderholm, L.; Stumpf, T.; Schmidt, M.

  • Lecture (Conference)
    Goldschmidt Konferenz 2019, 18.-23.08.2019, Barcelona, Spanien

Smart Kd-concept for a realistic description of sorption processes in repository safety assessment

Stockmann, M.; Becker, D.-A.; Noseck, U.; Brendler, V.

  • Poster
    GDCh-Jahrestagung der Fachgruppe Nuklearchemie 2019, 25.-27.09.2019, Dresden, Germany