Conference Abstract
| 
10 Nov 2021
Conference Abstract |
| 10 Nov 2021
| 10 Nov 2021
THEREDA – Thermodynamic Reference Database
Helge C. Moog
CORRESPONDING AUTHOR
Gesellschaft für Anlagen- und Reaktorsicherheit, Braunschweig, Theodor-Heuss-Straße 4, 38122 Braunschweig, Germany
Tina Scharge
Gesellschaft für Anlagen- und Reaktorsicherheit, Braunschweig, Theodor-Heuss-Straße 4, 38122 Braunschweig, Germany
Holger Seher
Gesellschaft für Anlagen- und Reaktorsicherheit, Braunschweig, Theodor-Heuss-Straße 4, 38122 Braunschweig, Germany
Frank Bok
Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
Vinzenz Brendler
Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
Anke Richter
Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
Laurin Wissmeier
CSD Engineers AG, Schachenallee 29A, 5000 Aarau, Switzerland
Marcus Altmaier
Institute for Nuclear Waste Disposal, Karlsruher Institut für Technologie, P.O. Box 3640, 76021 Karlsruhe, Germany
Xavier Gaona
Institute for Nuclear Waste Disposal, Karlsruher Institut für Technologie, P.O. Box 3640, 76021 Karlsruhe, Germany
Nese Cevirim-Papaioannou
Institute for Nuclear Waste Disposal, Karlsruher Institut für Technologie, P.O. Box 3640, 76021 Karlsruhe, Germany
Daniela Freyer
Institute for Inorganic Chemistry, Technische Univ. Bergakademie Freiberg, Leipziger Straße 29, 09596 Freiberg, Germany
Melanie Pannach
Institute for Inorganic Chemistry, Technische Univ. Bergakademie Freiberg, Leipziger Straße 29, 09596 Freiberg, Germany
Julia Sohr
Institute for Inorganic Chemistry, Technische Univ. Bergakademie Freiberg, Leipziger Straße 29, 09596 Freiberg, Germany
Wolfgang Voigt
Institute for Inorganic Chemistry, Technische Univ. Bergakademie Freiberg, Leipziger Straße 29, 09596 Freiberg, Germany
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Helge C. Moog, Tina Scharge, Holger Seher, Frank Bok, Vinzenz Brendler, Anke Richter, Laurin Wissmeier, Mareike Henneberg, Marcus Altmaier, Xavier Gaona, Nese Cevirim-Papaioannou, Daniela Freyer, Melanie Pannach, Julia Sohr, and Wolfgang Voigt
Saf. Nucl. Waste Disposal, 2, 157–157, https://doi.org/10.5194/sand-2-157-2023, https://doi.org/10.5194/sand-2-157-2023, 2023
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THEREDA represents a web-based system of programs enabling access to thermodynamic reference data for the needs of the final disposal of radioactive waste in Germany. It is the only polythermal database worldwide that covers the entire system of oceanic salts, including acids, bases and carbonates. THEREDA aims at calculation of solubilities in high-saline solutions and uses the Pitzer approach.
Vinzenz Brendler and Solveig Pospiech
Saf. Nucl. Waste Disposal Discuss., https://doi.org/10.5194/sand-2024-1, https://doi.org/10.5194/sand-2024-1, 2024
Revised manuscript under review for SaND
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Decisions associated with radioactive waste management are made in the presence of irreducible and reducible uncertainties. Here, the identification of such uncertainties (namely numerical ones), their ranking according to relevance, their categorization, the elucidation of internal dependencies and cross-interactions is addressed. Suitable methodologies to analyse and illustrate complex uncertainty patterns are discussed.
Helge C. Moog, Tina Scharge, Holger Seher, Frank Bok, Vinzenz Brendler, Anke Richter, Laurin Wissmeier, Mareike Henneberg, Marcus Altmaier, Xavier Gaona, Nese Cevirim-Papaioannou, Daniela Freyer, Melanie Pannach, Julia Sohr, and Wolfgang Voigt
Saf. Nucl. Waste Disposal, 2, 157–157, https://doi.org/10.5194/sand-2-157-2023, https://doi.org/10.5194/sand-2-157-2023, 2023
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THEREDA represents a web-based system of programs enabling access to thermodynamic reference data for the needs of the final disposal of radioactive waste in Germany. It is the only polythermal database worldwide that covers the entire system of oceanic salts, including acids, bases and carbonates. THEREDA aims at calculation of solubilities in high-saline solutions and uses the Pitzer approach.
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In the last few years, we have studied the immobilization of the long-lived fission product technetium-99 (99Tc) by various Fe(II) minerals. Those minerals enable the reduction of Tc(VII) to Tc(IV), which is crucial to decrease the migration of technetium in the environment. In the future, we want to analyze Tc immobilization strategies under more complex systems that could, in a more realistic way, improve environmental conditions.
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The immobilization of trivalent actinides (Am, Cm) and their less toxic homologue (Eu) in feldspar, a very common mineral in our earth crust, was studied by sorption experiments and spectroscopic studies. The speciation was identified and used to gain thermodynamic parameters to develop a surface complexation model. To sum up, feldspar, a main component of crystalline rock, is suitable for retaining radionuclides in a deep radioactive waste repository.
Alexandru Tatomir, Milena Schönhofen-Romer, Astrid Göbel, Dinara Abbasova, Thuro Arnold, Vinzenz Brendler, and Kateryna Fuzik
Saf. Nucl. Waste Disposal, 2, 225–226, https://doi.org/10.5194/sand-2-225-2023, https://doi.org/10.5194/sand-2-225-2023, 2023
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Capturing the state of knowledge in radioactive waste management is a very important activity for supporting member states with the implementation of their national programmes towards the safe and effective management of waste. This requires the involvement of experts sharing their expertise and knowledge with the wider community. During the past 3 years, we have gained valuable insights into the procedures of involving experts and knowledge sharing, and the lessons learnt are shown here.
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The Repository Site Selection Act explicitly emphasises that targeting the disposal of high-level radioactive waste is a so-called learning process. We are of the opinion that the procedure and the available data should be combined with geoscientific knowledge to support the identification of siting regions. We propose this workshop and invite all experts who have dealt with the search for a repository site from a geoscientific perspective.
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Saf. Nucl. Waste Disposal, 1, 161–162, https://doi.org/10.5194/sand-1-161-2021, https://doi.org/10.5194/sand-1-161-2021, 2021
Stephan Hilpmann, Robin Steudtner, Björn Drobot, René Hübner, Frank Bok, Thorsten Stumpf, and Andrea Cherkouk
Saf. Nucl. Waste Disposal, 1, 155–156, https://doi.org/10.5194/sand-1-155-2021, https://doi.org/10.5194/sand-1-155-2021, 2021
Andreas Poller, Susie M. L. Hardie, Gerhard Mayer, Marie Pijorr, Joachim Poppei, Paul Smith, Luca Urpi, and Laurin Wissmeier
Saf. Nucl. Waste Disposal, 1, 183–184, https://doi.org/10.5194/sand-1-183-2021, https://doi.org/10.5194/sand-1-183-2021, 2021
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The talk presents highlights from the generic identification and evaluation of processes for co-disposal of high-level radioactive waste and low- and intermediate-level radioactive waste in clay rock, crystalline rock and salt rock in the context of the German site-selection process for a deep geological repository for high-level radioactive waste on behalf of the Federal Office for the Safety of Nuclear Waste Management (BASE).
Laurin Wissmeier and Joachim Poppei
Saf. Nucl. Waste Disposal, 1, 109–110, https://doi.org/10.5194/sand-1-109-2021, https://doi.org/10.5194/sand-1-109-2021, 2021
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It has been recently recognized that the availability of liquid water may be a controlling factor for metal corrosion in a storage facility for radioactive waste. Since water is an educt for anaerobe corrosion, the reaction may be suspended or suppressed by the scarcity of water near the corroding surfaces. Gas pressure build-up through hydrogen generation may limit further water ingress. Our model focuses on the close coupling between gas generation through iron corrosion and water availability.
Astrid Göbel, Tobias Knuuti, Carola Franzen, Dinara Abbasova, Thuro Arnold, Vinzenz Brendler, Kateryna Fuzik, Jiří Faltejsek, Bálint Nős, Nadja Železnik, and Jitka Mikšová
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Saf. Nucl. Waste Disposal, 1, 151–152, https://doi.org/10.5194/sand-1-151-2021, https://doi.org/10.5194/sand-1-151-2021, 2021
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Saf. Nucl. Waste Disposal, 1, 159–160, https://doi.org/10.5194/sand-1-159-2021, https://doi.org/10.5194/sand-1-159-2021, 2021
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An overview on the recent advances in the field of high temperature studies of radionuclides in aqueous solutions will be given. Besides summarizing information on key technical aspects relevant for high temperature studies, the effect of increased temperatures on the complexation of trivalent actinides with chloride will be discussed in more detail, to illustrate newly derived in-depth understanding of the impact of increased temperatures on the (geo)chemical behaviour of trivalent actinides.
