47th Scientific Basis for Nuclear Waste Management Symposium

Session

Special Session: Ceramic and Crystalline Waste Forms (AcE) - 1

Time:

Tuesday, 07/Nov/2023:

9:00am - 10:30am

Session Chair: Nina Huittinen
Session Chair: Gabriel Murphy

Location: Lecture Hall

Session Abstract

Special Session: Ceramic and crystalline waste forms (organised by Nina Huittinen, HZDR, Dresden, Germany)

Ceramic and crystalline materials are key components in the nuclear fuel cycle and they may play an important role in future envisioned waste management technologies. In addition, crystalline solid phases are likely to be generated in-situ during long-term storage of spent nuclear fuel or other high-level waste streams following corrosion of the primary waste form. For this session, we welcome contributions addressing novel synthesis strategies of ceramics and crystalline materials, their characterization using computational and experimental approaches, and studies addressing chemical and physical properties of crystalline materials. Particular emphasis is placed on assessing their long-term stability, dissolution behavior, and radiation tolerance over extended timeperiods. The session will include contributions from a German national project “AcE” (Actinide immobilization by incorporation into solid phases relevant for final disposal) funded by the German Federal Ministry of Education and Research (BMBF). Central topics of the AcE project are directly related to the session topics and involve the development of synthesis strategies for primarily An(IV)-doped solid phases such as zirconates (ZrO2 and Ln2Zr2O7), UO2, and monazite type orthophosphates (LnPO4), their structural characterization, and assessment of material performance following irradiation. Our invited speaker Prof. Nicolas Dacheux will open the session on ceramic and crystalline materials.

Presentations

9:00am - 9:30am

Ceramic waste forms for the specific immobilization of radionuclides: from synthesis to long-term behavior

Nicolas Dacheux¹, Stephanie Szenknect², Renaud Podor³, Nicolas Clavier³

¹ICSM, University of Montpellier, France; ²ICSM, CEA, France; ³ICSM, CNRS, France

9:30am - 9:45am

Evaluation of surrogate-models for the incorporation of tetravalent actinides in monazite- and zircon-type phases for long-term disposal

Theresa Lender¹, Luiza Braga Ferreira dos Santos², Nina Huittinen², Kristina Kvashnina², Elena Bazarkina², Peter Appel³, Lars Peters¹

¹Institute of Crystallography, Rheinisch–Westfälische Technische Hochschule Aachen University, Jägerstr. 17–19, 52066 Aachen; ²Institute of Resource Ecology, Helmholtz–Zentrum Dresden–Rossendorf, Bautzner Landstr. 400, 01328 Dresden; ³Institute of Geosciences, Christian-Albrechts-University Kiel, Ludewig-Meyn-Straße 10, 24118 Kiel

9:45am - 10:00am

Structural changes in Ln-Monazite single crystals under swift heavy ion irradiation

Julien Marquardt¹, Theresa Lender², Lkhamsuren Bayarjargal¹, Eiken Haussühl¹, Christina Trautmann³, Lars Peters², Björn Winkler¹

¹Goethe Universität Frankfurt; ²RWTH Aachen; ³GSI Hemlholtz Centre for Heavy Ion Reseach Dresden

10:00am - 10:15am

Structural analyses of heavy-ion irradiated monazites

Nina Huittinen^1,2, Sara Gilson¹, Andrey Bukaemskiy³, Gabriel Murphy³, Julien Marquardt⁴, Theresa Lender⁵, Holger Lippold¹, Volodymyr Svitlyk¹, Jonas Nießen⁵, Christoph Hennig¹, Shavkat Akhmadaliev¹, Selina Richter¹, Jenna Poonoosamy³, Christina Trautmann⁶

¹Helmholtz-Zentrum Dresden-Rossendorf, Germany; ²Freie Universität Berlin, Germany; ³Forschungszentrum Jülich, Germany; ⁴Johann Wolfgang Goethe-Universität Frankfurt, Germany; ⁵RWTH Aachen University, Germany; ⁶GSI Helmholtzzentrum für Schwerionenforschung

10:15am - 10:30am

TAKING NUCLEAR WASTE TO EXTREMES TO DESIGN SAFE UNDERGROUND REPOSITORIES

Volodymyr Svitlyk^1,2, Stephan Weiss¹, Christoph Hennig^1,2

¹Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Dresden, Germany; ²Rossendorf Beamline (BM20), European Synchrotron Radiation Facility, Grenoble, France

Conference Agenda