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Information × Registration Number 0213U007420, 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 24-10-2013 Organization National Science Center "Kharkiv Institute of Physics and Technology popup.description2 We studied patterns of swelling 18Cr10NiTi steel - the basic material internals reactors WWER-1000 - in a simulation of irradiation with heavy ions. The experimental dependence of the swelling began to dose and irradiation temperatures at speeds creating displacement 10-2 and 10-3 dpa/s were obtained. It's shown that at lower speeds for creating displacement of pore formation temperature range expands and shifts to a lower temperature exposure, the absolute value of swelling increased. At temperatures corresponding to the maximum swelling of steel, with the intensity of radiation at the rate of swelling of the steady state decreases, and the incubation period is increasing. The increase in temperature reduces the exposure incubation period. In view of the reactor and accelerator data shows that the maximum value of the temperature, the incubation period, of the swelling rate and the width of the temperature dependence of swelling have a logarithmic correlation with the displacement rate. Obtained in the simulation experiments, systematic data on swelling of austenitic steel, along with the known reactor 18Cr10NiTi data were used in constructing empirical function to compute swelling 18Cr10NiTi steel in a wide range of doses, irradiation temperature and velocity to create offsets. Maps of the swelling, to predict the behavior of steel 18Cr10NiTi irradiated to high doses. Prediction of the swelling began 18Cr10NiTi T on section cubicle VVER-1000 reactor in continuous operation up to 30-60 years. For the first time using an empirical model developed shows uneven swelling material cubicle WWER-1000 in the area between the cooling channels and the surface facing the core. Analyzed the validity of the extrapolation function obtained at lower speeds for creating displacement characteristic for thermal reactors. To this end, a comparison of the results obtained by swelling of the existing empirical literature functions. Found that the proposed model is generally consistent with the known, but, as shown, it is the best and most closely reflects the behavior of swelling on section cubicle WWER-1000 on the dose, temperature and speed of a displacement in the long term operation. 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 Пермяков Олексій Вікторович Пилипенко Микола Миколайович Шевцов Анатолій Богданович popup.nrat_date 2020-04-02 Close