2019, Ivanov, B. V., Anikin, A. S., Bukin, A. N., Sergeecheva, Y. V., Devyatko, Y. N., Khomyakov, O. V., Хомяков, Олег Владимирович

© 2019, Pleiades Publishing, Ltd.Abstract: A method for obtaining the quasi-one-dimensional distribution of tritium in zirconium alloys was developed. Various conditions of saturation of samples with tritium were analyzed and distributions of tritium concentration corresponding to the saturation conditions were measured. An algorithm for restoring of the diffusion coefficient of hydrogen in zirconium alloys by the radioluminography method was developed. The temperature dependence of the hydrogen diffusion in E110 alloy was constructed.

2019, Devyatko, Yury N., Khomyakov, Oleg V., Tenishev, Andrey V., Mikhalchik, Vladimir V., Shornikov, Dmitry P., Хомяков, Олег Владимирович, Тенишев, Андрей Вадимович, Михальчик, Владимир Валерьевич, Шорников, Дмитрий Павлович

The paper proposes a method for reducing the true pore size in oxide nuclear fuel using a well-known histogram for the distribution of the pores cross sections across the polished section. It is shown that the problem of constructing a continuous pore size distribution function from the pore size distribution histogram is incorrect. Histograms showing pore distributions across the polished sections of oxide nuclear fuel sintered under various conditions are obtained. The Scheil-Saltykov method was used to reduce histograms for 3D pore size distributions in uranium oxide fuel.

2020, Devyatko, Y. N., Khomyakov, O. V., Tenishev, A. V., Matvenov, M. E., Shornikov, D. P., Хомяков, Олег Владимирович, Тенишев, Андрей Вадимович, Матвенов, Максим Евгеньевич, Шорников, Дмитрий Павлович

© 2020 The Physical Society of Japan.The paper studies the sintering kinetics of pelletized oxide nuclear fuel in terms of various parameters (heating rate, sintering temperature, partial pressure of oxygen in sintering atmosphere). It considers calculated experimental pore size distributions in sintered fuel pellets. Study of the evolution of pore size distributions let us determined the physical mechanism of sintering of uranium dioxide. The sintering process is controlled by the mechanism of viscous flow under the influence of capillary forces and residual stresses.