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Information × Registration Number 0124U000551, ( 0224U033447  0226U000406  ) R & D request Title Statistical theory of micro- and nanostructural evolution in alloys and fuel cells under neutron irradiation Head Alina V. Dvornichenko, Кандидат фізико-математичних наук Registration Date 18-01-2024 Organization Sumy State University popup.description1 The goal of this project is a self-consistent description of the processes of microstructural transformations in the structural materials of nuclear reactors and fuel cells under neutron irradiation by taking into account the radiation-induced processes of ballistic mixing and the dynamics of non-equilibrium point defects. In order to achieve the goal, the following tasks are planned to be solved in this project. Development of a generalized theoretical approach and phase-field model for studying the dynamics of precipitation/dissolution of precipitates of secondary phases and mechanisms of segregation/clustering of point defects in alloys based on iron and zirconium. Generalization of the phase field model of the evolution of gas-filled pores in uranium silicide. Establishing the conditions for precipitation of new phases enriched by chromium (for reactor covers) and niobium (for power-shell elements) during solid solution annealing and microstructural transformations during construction material irradiation. Modeling of precipitation processes of secondary phases during annealing of solid solutions. Modeling of the processes of dissolution of existing precipitates and radiation-stimulated precipitation of new precipitates for different values of the irradiation temperature, dose rate, and characteristics of ballistic mixing of atoms in irradiated materials. Modeling of growth processes of gas-filled pores in fuel cells under different irradiation conditions. Establishing the effect of irradiation conditions on the statistical properties of precipitates of new phases in irradiated materials and gas-filled pores in fuel cells. Analysis of the impact of irradiation on the physical and mechanical properties of structural materials and swelling of fuel cells popup.nrat_date 2024-12-09 Close