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| Автори: Димова, Г. Т. Заглавие: Reactor Pressure Vessel Internals: Research on the Effects of Aging Caused by Operating Conditions Ключови думи: Nuclear Reactor, Internals, Corrosion, Swelling Абстракт: The operating conditions of a nuclear reactor vessel are characterized by high values of pressure and temperature of the fluid along the primary circuit, variable loads, intense neutron fluxes and a corrosively aggressive environment. All these factors cause aging of the Reactor Pressure Vessel (RPV) Internals metal. The mechanisms of degradation of the mechanical properties are neutron and thermal brittleness, corrosion, erosion, fatigue and wear. Corrosion of the metal is caused by the fluid along the primary circuit of the nuclear power plant. The high values of the reactor temperatures and the operating stresses cause stress corrosion and corrosion fatigue. Neutron flux causes the most damaging effect on the metal structure. After prolonged periods of exposure to high-energy neutrons (several decades), the metal of the reactor vessel becomes brittle and strengthened. Temperature and dose load gradients can cause swelling of the metal of the reactor internals. Swelling is an increa Библиография Издание
Издателските права се държат от Journal of Power and Energy Engineering Пълен текст на публикацията | Autors: Dimova, G. T. Title: Reactor Pressure Vessel Internals: Research on the Effects of Aging Caused by Operating Conditions Keywords: Nuclear Reactor, Internals, Corrosion, Swelling Abstract: The operating conditions of a nuclear reactor vessel are characterized by high values of pressure and temperature of the fluid along the primary circuit, variable loads, intense neutron fluxes and a corrosively aggressive environment. All these factors cause aging of the Reactor Pressure Vessel (RPV) Internals metal. The mechanisms of degradation of the mechanical properties are neutron and thermal brittleness, corrosion, erosion, fatigue and wear. Corrosion of the metal is caused by the fluid along the primary circuit of the nuclear power plant. The high values of the reactor temperatures and the operating stresses cause stress corrosion and corrosion fatigue. Neutron flux causes the most damaging effect on the metal structure. After prolonged periods of exposure to high-energy neutrons (several decades), the metal of the reactor vessel becomes brittle and strengthened. Temperature and dose load gradients can cause swelling of the metal of the reactor internals. Swelling is an increa References Issue
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