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Information × Registration Number 0210U003980, 0107U010266 , R & D reports Title Development and introduction of the control methodology and shut down heat exchange tubes of steam generator PGW-1000 of power units of the nuclear power plants of Ukraine and a justification of a residual resource of defective pipes. popup.stage_title Head Mitrofanov Anatoliy Sergeyevich, Registration Date 13-04-2010 Organization National Science Center "Kharkiv Institute of Physics and Technology popup.description2 Objects of research - defects in heat exchanger tubes of steam generator plant produced during operation. Its objective - improving monitoring and setting performance heat exchanger tubes of steam generators. With the help of modern methods based on the created us "Atlas of operational defects" have been developed and established methodology related data metallography and vihrestrumovogo control. In support of the residual life were carried out mechanical tests of ring samples of heat exchanger tubes. Tests were conducted at 20 and 300 0C in the presence of samples of both artificial and operational defects. Created and implemented the South Ukrainian nuclear power plant in the workflow control heat exchanger tubes of steam generator heat exchanger tubes of control methodology and determine their efficiency. The new methodology is that the defects identified vihrestrumovim control, include using tables to one of four types of operational defects "Atlas". Then in the "Atlas" are appropriate defect and determine the likelihood of its disclosure with further exploitation. For the experimental determination znemitsnyuyuchogo influence of operating various types of defects has been used and improved test methods for the ring samples, which allows to determine the mechanical properties of the metal heat exchanger tubes. Tests were conducted on ring samples Tensile 1246R-2/2300 and "INSTRON" both at 20 0C and at an operating temperature of tubes 300 0C. With factual techniques and digital photography were obtained images of kinks, which included the area of the defect and the residual metal. For the digitization of images and calculations were applied mathematical methods, as well as adapted and applied the program Win DIG. In the course of work carried out comparative tests of ring samples from the heat exchanger tubes without defects and with different operational defects. The nature of changes in the mechanical properties of metal with defects of various types. Analyzed margin heat exchanger tubes affected by corrosion defects. Source tension diagram of ring samples with cuts and defects of various kinds for which defined the borders of strength, proof stress. Experiments have revealed the dependence of the mechanical properties of the metal ring samples heat exchanger tubes for certain types of defects with different depths of defeat. Analysis of results showed that the metal ring samples with operational defects depth of up to 50% has a yield stress and strength not less than the standard for this steel. Determine how the creation of artificial defects on the outer surface of the heat exchange tubes. The two fragments of heat exchanger tubes 50 cm long suffered mechanical artificial defects that mimic elements of the known types of operational defects. With the control system vihrestrumovogo "MIZ-30" (Zaporizhzhya NPP) held vihrestrumovy control. Results vihrestrumovogo control of the control samples were compared and analyzed with the results of monitoring for defects in the "Atlas of operational defects. The results will improve the quality control of heat exchanger tubes of steam generators, waste and optimize the number of tubes intended to kill. Product Description popup.authors Ажажа Жанна Сергіївна Крайнюк Євген Олександрович Лісна Валентіна Горгіївна Митрофанов Анатолій Сергійович Ожигов Леонид Семенович Савченко Володимир Іванович Шаповал Іван Миколайович popup.nrat_date 2020-04-02 Close