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Information × Registration Number 0122U001270, ( 0222U003884  0223U004937  ) R & D request Title Aging of WWER-1000 reactor piping metal during design life and its impact on safety over design life Head Hozhenko Serhii V., Кандидат технічних наук Registration Date 09-02-2022 Organization National Science Center "Kharkiv Institute of Physics and Technology" popup.description1 The aim of the work is to increase the safety of operation of WWER-1000 reactor pipelines, which ensure the operation of steam generators, with over-design service life due to in-depth study by direct methods of structural manifestations of metal aging (assessment of actual technical condition of metal). The pipelines that ensure the operation of steam generators include the main circulation pipelines, pipelines of "hot" steam and feed water of WWER-1000 reactor units. The pipelines are operated at a temperature of 230-320°C and a pressure of 80-160 kgf/cm2. The pipelines are made of low-alloy steels 10ГН2МФА, 16ГС and carbon steel Ст20, which age during long-term operation in the above temperature range. Control of normative properties of metal during scheduled inspections of pipelines characterizes their efficiency at the time of inspection and does not guarantee trouble-free operation during continued operation. Regulatory properties can have equal values at different stages of metal aging and different dynamics of their changes during continued operation. Control of structural manifestations of metal aging eliminates this ambiguity. popup.nrat_date 2024-12-09 Close