Regensburg 2025 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 73: Poster Metal and Semiconductor Substrates: Adsorption and Reactions of Small Molecules
O 73.1: Poster
Mittwoch, 19. März 2025, 18:00–20:00, P2
In-situ tritium contamination and decontamination of fusion-relevant materials — •Elizabeth Paine1, Dominic Batzler2, James Braun2, Robin Größle2, Philipp Haag2, Marco Röllig2, Marie-Christine Schäfer2, Marius Schaufelberger2, and Kerstin Trost2 — 1Eindhoven University of Technology, The Netherlands — 2Tritium Laboratory Karlsruhe, Karlsruhe Institute of Technology, Germany
Nuclear fusion could offer a solution to the growing global demand for clean, sustainable and abundant energy. The deuterium-tritium fusion reaction offers a high energy yield and feasibility at achievable temperatures. However, the scarcity and radioactive nature of tritium pose significant challenges for its handling in fusion reactors. Tritium adsorption onto surfaces leads to challenges in licensing, process control and maintenance. Ozone is a known decontaminant and may provide a viable solution for the decontamination of these tritiated surfaces. Due to its strong oxidising nature, ozone reacts with the adsorbed tritium, which can then be evacuated. This study aims to investigate tritium accumulation and decontamination on the fusion-relevant materials: beryllium, EUROFER97 and tungsten. These are selected for their critical roles in reactor components and tritium-processing systems. The findings will provide insights into the behaviour of tritium in these materials and assess the potential of ozone-based decontamination techniques compared to established methods. This contributes to the development of effective strategies for tritium handling, decontamination and inventory management in future fusion reactors.
Keywords: Fusion; Tritium; Ozone