Hannover 2020 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 10: Accelerator Mass Spectrometry and Applications II

MS 10.4: Vortrag

Donnerstag, 12. März 2020, 11:45–12:00, f128

Measurements of volatile radioactive isotopes in reactor graphite — •Timm-Florian Pabst, Gereon Hackenberg, Stefan Heinze, Susan Herb, Yannik Jakobi, Claus Müller-Gatermann, Markus Schiffer, Alexander Stolz, and Alfred Dewald — Institute for Nuclear Physics, University of Cologne, Germany

In order to determine the tritium concentration in reactor graphite samples, we expanded our ion source test bench. We added a 100 kV accelerator stage along with a 90 analyzing magnet and a silicon detector, with the aim to suppress the molecular background for tritium measurements.

Activated graphite from graphite moderated reactors contains volatile radioactive isotopes like 14C, 36Cl, or 3H. For a final disposal of reactor graphite a quantitative characterization is needed.

We are aiming for a system which allows fully automated measurements of 14C, 36Cl and 3H with a high sample throughput by using AMS techniques with gaseous samples. This will allow for an optimal handling of the nuclear waste, which has to be stored in disposal sites like e.g. Zeche Konrad.

In this contribution we will present the layout of our system as well as preliminary results of first test runs.

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