Analysis of the reactor experiments results on the study of gas evolution from two-phase Li2TiO3-Li4SiO4 lithium ceramics
Kenzhina I. Kulsartov T. Knitter R. Chikhray Y. Kenzhin Y. Zaurbekova Z. Shaimerdenov A. Kizane G. Zarins A. Kozlovskiy A. Gabdullin M. Tolenova A. Nesterov E.
March 2022Elsevier Ltd
Nuclear Materials and Energy
2022#30
This paper analyzes part of the reactor experiments on the study of tritium and helium release from promising two-phase lithium ceramic (Li2TiO3 and Li4SiO4) of natural lithium enrichment conducted by vacuum extraction. The basis for such an analysis was a more careful study of the time trend of pressure changes of gases in the chamber with the test samples. In a particular case, it was clearly shown that the pressure fluctuations observed during irradiation for gases with mass number M4 (to which both HT and He molecules correspond) are determined only by He, which leaves the intergranular regions of the ceramic through open channels or cracks. The kinetics of changes in the amount of helium that is released during irradiation was traced and both the rate of helium release and the frequency of emissions were determined. It was assumed that the observed emissions correspond to a certain “formation of free paths” from the internal cavities of the irradiated ceramics into the chamber of the facility. The data obtained for the helium emissions were compared with the release of tritium-containing molecules from the ceramics. The quasi-equilibrium levels of the release of tritium-containing molecules and their dependence on the reactor power were estimated. The release of helium and tritium was compared with the calculated values of the tritium generation rate in the test sample.
Neutron irradiation , Tritium , Tritium release , Two-phase lithium ceramic
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Al-Farabi, Kazakh National University, Almaty, Kazakhstan
Institute of Nuclear Physics, Almaty, Kazakhstan
Kazakh-British Technical University, Almaty, Kazakhstan
Karlsruhe Institute for Technology, Karlsruhe, Germany
University of Latvia, Riga, Latvia
Satbayev University, Almaty, Kazakhstan
Tomsk Polytechnic University, Tomsk, Russian Federation
Al-Farabi
Institute of Nuclear Physics
Kazakh-British Technical University
Karlsruhe Institute for Technology
University of Latvia
Satbayev University
Tomsk Polytechnic University
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