Reactor experiments on irradiation of two-phase lithium ceramics Li2TiO3/Li4SiO4 of various ratios
Kulsartov T. Zaurbekova Zh. Knitter R. Chikhray Ye. Kenzhina I. Askerbekov S. Shaimerdenov A. Kizane G.
December 2023Elsevier Ltd
Fusion Engineering and Design
2023#197
The design of future fusion reactors involves the production of tritium inside the breeder blanket. The most promising material for solid breeder blankets is a two-phase lithium ceramic containing orthosilicate Li4SiO4 (LOS) and metatitanate Li2TiO3 (LMT) of lithium in various proportions. Tritium is formed in lithium under neutron irradiation by the reaction 6Li(n,α)T. Further, this tritium is extracted from the blanket with a purge gas and returned to the fusion zone, realizing the concept of a closed fusion cycle. Irradiation under fission reactor conditions is still one of the few available methods for estimating the parameters of tritium generation and release from lithium-containing materials in the in-situ mode. This paper presents the results of experiments on neutron irradiation of two-phase lithium ceramics of various ratios (LOS + 35 mol. % LMT (pebble size 250–1250 μm), LOS + 35 mol. % LMT (pebble size 500–710 μm) and LOS + 25 mol. % LMT (pebble size 500–710 μm) at the WWR-K research reactor. Irradiation of each batch of samples lasted from 5 to 22 days. The experiments were carried out by the vacuum extraction method. This paper describes the main methodological aspects of the studies, namely the technical features of four irradiation campaigns, the sequence and scope of the studies. A comparison is also made of the initial sections of reactor experiments for all campaigns, where the reactor was sequentially brought to power, according to which the parameters of the Arrhenius dependence of the effective tritium diffusion coefficients were estimated.
Neutron irradiation , Tritium , Tritium release , Two-phase lithium ceramic
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Institute of Applied Sciences and Information Technologies, Almaty, Kazakhstan
Karlsruhe Institute for Technology, Karlsruhe, Germany
Institute of Nuclear Physics, Almaty, Kazakhstan
University of Latvia, Riga, Latvia
Kazakh-British Technical University, Almaty, Kazakhstan
Satbayev University, Almaty, Kazakhstan
Institute of Applied Sciences and Information Technologies
Karlsruhe Institute for Technology
Institute of Nuclear Physics
University of Latvia
Kazakh-British Technical University
Satbayev University
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