Modeling of hydrogen isotopes release from lithium ceramics Li2TiO3 during in-situ experiments using vacuum extraction method


Kulsartov T. Kenzhina I. Tolenova A. Kenzhin Y. Shaimerdenov A. Nesterov Y. Gizatulin S. Chikhray Y. Gluchshenko A.
September 2021Elsevier Ltd

Fusion Engineering and Design
2021#170

Lithium ceramics Li2TiO3 in spherical granules (pebbles) is one of the most promising functional material for use in breeder blankets of a fusion reactor. In paper the experiments on a study of tritium and helium release from lithium ceramics Li2TiO3 (pebbles with a diameter of 1 mm, enrichment in 6Li is 96 %, weight ~ 0.37 g) under irradiation at the WWR-K research reactor (Almaty, Kazakhstan) are presented. The experiments showed that the main amount of tritium is released as HT molecules (the HT yield is an order of magnitude higher than T2 molecules yield). The release of tritium in the form of tritium water molecules was not recorded. The HT molecule yields significant growth occurs at the initial moment with an increase in the ceramic temperature (while the T2 molecule release drops), after which the release flux decreases to the average level. The experimental results were evaluated by a qualitative model based on the obtained analytical expression for the tritium flux from a spherical ceramic sample for the given experimental conditions.

Lithium ceramic , Neutron irradiation , Tritium , Tritium release

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Institute of Applied Sciences and Information Technologies, Almaty, Kazakhstan
al-Farabi Kazakh National University, Almaty, Kazakhstan
Kazakh-British Technical University, Almaty, Kazakhstan
Satbayev University, Almaty, Kazakhstan
Institute of Nuclear Physics, Almaty, Kazakhstan
National Research Tomsk Polytechnic University, Tomsk Polytechnic University, Tomsk, Russian Federation

Institute of Applied Sciences and Information Technologies
al-Farabi Kazakh National University
Kazakh-British Technical University
Satbayev University
Institute of Nuclear Physics
National Research Tomsk Polytechnic University

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