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Information × Registration Number 0212U002431, 0110U004273 , R & D reports Title Development of substantiation technique of prolongation opportunity for safe term operation in pressure vessel internals for VVER-1000 nuclear reactors popup.stage_title Head Voyevodin Victor Mykolayovych, Доктор фізико-математичних наук Registration Date 24-02-2012 Organization National Science Center "Kharkiv Institute of Physics and Technology popup.description2 The influence of aging on radiation swelling CR18NI10TI steel, which is a material of pressure vessel internals of WWER lid of Rivne NPP after steam 145.8 thousand hours of operation. An exposure of these samples with heavy ions. Studied the original structure and the structure of steel after ion irradiation Cr18Ni10Ti. Constructed and analyzed the experimental swelling curves aged steel on the dose and temperature exposure. Found that long-term aging of the material led to an increase in low-temperature region swelling due to segregation processes. At high temperatures, exposure to steel aged observed suppression of swelling due to enhanced evaporation of vacancies from the surface pores. It is shown that with increasing radiation dose and concentration of pores increases reaching a maximum decreases due to coalescence and coagulation processes, while the pore size increases monotonically. Compared with the original material as the concentration of pores in aged steel is much higher and their size is approximately 4 times smaller. The features are likely related to the synergistic effect of alloying elements out of the solid solution after prolonged aging and the accumulation of gases in this material. Analyzed experimental data on swelling steel Cr18Ni10Ti obtained in fast reactor BOR-60, and data are installed on heavy-ion accelerators ESUVI. Comparing experimental data with swelling swelling calculated by simulating the functions invented in the previous phase of this project. Determined error parameters are included in the modeling function. Shown that the calculated temperature and swelling dose curves steel Cr18Ni10Ti satisfactorily agree with experimental data at high doses and temperatures close to the maximum swelling. Product Description popup.authors Автушко Анатолій Андрійович Бородін Олег Вікторович Брик Віктор Васильвич Василенко Руслан Леонідович Воєводін Віктор Миколайович Кальченко Олександр Сергійович Лимар Раїса Іванівна Мельниченко Валентин Вікторович Назаренко Євген Олександрович Неклюдов Іван Матвійович Пермяков Олексій Вікторович Пилипенко Микола Миколайович Шевцов Анатолій Богданович popup.nrat_date 2020-04-02 Close