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Дата издания
16.06.2025Область исследования
Тип исследования
Аннотация (краткое описание)
It is known that one of the most important parameters for lithium ceramics, promising for use in solid-state fusion blankets, includes their properties regarding tritium. Tritium generated in lithium ceramics (as a result of reaction of 6Li atom with neutron) is released from the surface after passing through a chain of processes: 1. it is initially thermalized in the ceramic volume (it should be noted that at this stage, if the reaction of its generation has occurred in the near-surface region, it can be released from the sample in an inactivation-free manner), 2. after that it diffuses to the open surface, interacting with traps in the ceramic volume (here both reversible and non-reversible capture of tritium by traps, which are usually defects in the structure, is possible); 3. tritium atoms associate with each other or with hydrogen impurities on the surface, after which the resulting molecules are desorbed. To determine the parameters of gas release from ceramics generated by neutron irradiation of tritium, reactor studies are usually carried out. Analysis of the results of such reactor experiments is usually complicated by the need to consider various factors and requires careful consideration of these factors while creating and selecting model parameters. The present work presents data on modeling the results of a previously conducted reactor experiment. Modeling was carried out by the finite element method (FEM) based on a complex model that considers temperature gradients across the ceramics during the reactor experiment, as well as the processes of tritium diffusion in the volume and desorption of tritium molecules from the ceramic surface. We investigated the sections of the reactor experiment where the reactor power was varied, leading to changes in the temperature fields in the ceramic samples and the released flux of tritium molecules.DOI
10.1016/j.jnucmat.2025.155979Тип публикаций
Сведения о финансировании
The research was funded by the Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan with Program number BR21882237.Данный документ располагается в коллекциях
Международные публикации ученых SU
Scopus