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Information × Registration Number 0224U001344, 0122U002427 , R & D reports Title Investigation of radiation stability of WWER reactor materials under overtime conditions using integrated multilevel modeling and experimental validation by nuclear physics and structural method popup.stage_title Head Storizhko Volodymyr Yu., Доктор фізико-математичних наук Registration Date 22-01-2024 Organization Institute of Applied Physics National Academy of Sciences of Ukraine popup.description2  The concentrations of Cr and Ni atoms in the Fe-20Cr-8Ni sample were calculated depending on the rate of production of point defects and temperature. The mutual influence of the rate of production of point defects and temperature on the concentration profiles of the alloy components was studied. The equilibrium of two rigidly connected elastic half-planes made of different materials, at the border of which a semi-infinite thin rigid inclusion is placed, was investigated. The size of the contact region of the crack banks, stress distributions at the boundary of the separation of half-planes, stress intensity coefficients were found. Numerical modeling of the process of vacancy and interstitial defect clustering was carried out for some alloys used in reactor designs. Using the created PALS digital spectrometer with a closed positron source, the positron lifetime spectrum was measured by the γγ-coincidence method and the obtained spectra were analyzed. The parameters of the time resolution hardware function for the spectrometer are obtained and the positron lifetime constants are shown to agree with theoretical predictions. Product Description popup.authors Aleksenko Oleg V. Bystryk Yurii S. Denysenko Vytalii L, Stаnislаv Denisov Koropov Oleksandr V. Krukla Sergey V. Kulmentiev Oleksandr I. Ostrik Volodymyr І. Skorokhod Roman V. Storizhko Volodymyr Yu. popup.nrat_date 2024-01-22 Close