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Information × Registration Number 0219U000955, 0116U006287 , R & D reports Title Development of the generalized procedure and recommended practice for performing the calculated analysis of the stress-strain state and fracture resistance to substantiate the strength and extension of lifetime of RPVs as well as NPP with WWER primary circuit equipment elements using the current methods of consideration of deficiency and deformation history of thermomechanical loading popup.stage_title Head Kharchenko Valeriy V., Доктор технічних наук Registration Date 20-03-2019 Organization Institute for problems of strength NASci of Ukraine popup.description2 Using the developed procedure of the improved stress- strained state (SSS) calculation and analysis of the resistance to the destruction of NPP's the 1st circuit equipment elements from the WWER, new results were obtained for calculating the resistance to the destruction of the welding unit of the coolant collector to the body of PGV-1000M steam generator with surface defects of various forms in the simulation of the operating load cycle and emergency mode. According to the data obtained, deformation loading history, the residual technological tension and the consideration of extensive surface damage of corrosion origin substantially affect the resistance to the destruction of the welding unit. It is shown that the traditional linear-elastic calculation of the resistance to the destruction of the welding unit does not provide sufficient degree of conservatism, which leads to an overestimate of its strength. The developed procedure of SSS calculation and resistance to the destruction of welding units was used to substantiate the life-time prolongation for 20 years of PGV-1000M steam generators of power unit number 3 of Rivne NPP. Product Description popup.authors Кобельський Сергій Володимирович Кравченко Віктор Іванович Харченко Валерій Володимирович Чирков Олександр Юрійович popup.nrat_date 2020-04-02 Close