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Дата издания
22.08.2025Область исследования
Тип исследования
Аннотация (краткое описание)
This paper presents the results of determining the parameters of tritium transfer processes in lithium ceramics Li2TiO3 under reactor irradiation conditions. Analysis of sections with a short-term decrease in reactor power allowed numerical determination of the Arrhenius parameters of tritium diffusion (pre-exponential factor and activation energy) based on comparison with in situ experimental data. The obtained values of activation energy (70.2–74.7 kJ/mol) and pre-exponential factor (0.9–2.1 × 10−8m2/s) demonstrate growth with increasing fluence, which is explained by the accumulation of radiation defects in ceramics. A linear dependence was established between D0 and Ea, corresponding to the Mayer–Noldel rule. Unlike previously conducted studies based on a phenomenological approach to assessing only the activation energy of diffusion, in this study, a complex model that takes into account temperature gradients, tritium generation, its diffusion, and release from the surface was used. The applicability of such an integrated approach to the analysis of in situ reactor experiments with lithium ceramics was confirmed, and allowed us to estimate changes in the tritium transfer parameters in lithium ceramics Li2TiO3 depending on the irradiation time. © 2025 by the authors.DOI
10.3390/met15101070Тип публикаций
Сведения о финансировании
The research has been funded by the Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan with Program number BR21881930.Данный документ располагается в коллекциях
Международные публикации ученых SU
Scopus