E. A. Kuleshova, S. V. Fedotova, D. A. Maltsev, A. A. Potekhin
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Trends of Structure Degradation of VVER-1000 Reactor Pressure Vessel Steels Determining Their Performance at Lifetimes of over 60 Years
Changes in the structural state of steels of VVER-1000 reactor pressure vessels (RPVs) at an extended lifetime of 60 years and more were considered. A comprehensive analysis of available experimental data on changes in the structural state of RPV materials under irradiation was carried out. Extended dose dependences of the accumulation rate of radiation-induced structural elements and grain-boundary segregation of phosphorus are presented. The nature of changes in strength characteristics and critical brittleness temperature of RPV materials due to irradiation was shown. A preliminary estimate of the lifetime of RPV steels depending on their nickel content was made basing on the study of trends in the volume density and average size of radiation-induced structural elements, radiation defects, and radiation embrittlement mechanisms.
期刊介绍：
Physics of Atomic Nuclei is a journal that covers experimental and theoretical studies of nuclear physics: nuclear structure, spectra, and properties; radiation, fission, and nuclear reactions induced by photons, leptons, hadrons, and nuclei; fundamental interactions and symmetries; hadrons (with light, strange, charm, and bottom quarks); particle collisions at high and superhigh energies; gauge and unified quantum field theories, quark models, supersymmetry and supergravity, astrophysics and cosmology.
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