Hannover 2020 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 8: Accelerator Mass Spectrometry and Applications I

MS 8.4: Vortrag

Mittwoch, 11. März 2020, 15:30–15:45, f128

Application of AMS to the research on nuclear waste disposal safety — •Francesca Quinto1, Ingo Blechschmidt2, Thomas Faestermann3, Karin Hain4, Dominik Koll3, Gunther Korschinek3, Stephanie Kraft1, Johanna Pitters4, Markus Plaschke1, Georg Rugel5, Thorsten Schäfer6, Peter Steier4, and Horst Geckeis11Karlsruhe Institute of Technology, Germany — 2National Cooperative for the Disposal of Radioactive Waste, Switzerland — 3Technical University of Munich, Germany — 4University of Vienna, Austria — 5Helmholtz-Zentrum Dresden-Rossendorf, Germany — 6Friedrich-Schiller-University, Jena, Germany

At the Grimsel Test Site (Switzerland), several in situ tracer tests aim at studying the possible radionuclide release from the bentonite engineered barrier system and the processes which may lead to their subsequent migration though the granodiorite host rock. We investigate the diffusion of Tc-99 and actinides (AN) through the bentonite and the remobilization over a time period of several years of the AN tracers employed in previous in situ tests. AMS is the ultra-trace analysis method of choice for studying the behaviour of Tc-99 and AN with concentration at and below fg/g levels in such dedicated long-term in situ tests, providing results that contribute to the safety evaluation of future nuclear waste repositories.

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