14 - Lifetime prediction techniques for nuclear power plant systems

Abstract

Advanced lifetime prediction methodologies are necessary in securing the safe and reliable operation of nuclear power plants. Stress corrosion cracking is the most common corrosion mechanism, which can cause a major integrity loss in metallic components. The cracking is caused by the combined action of corrosion, tensile stresses and a susceptible material. Risk-informed inspection is a more recent technique for better focusing of in-service inspections. Stress corrosion cracking is considered in the lifetime analyses. In addition to the metallic materials, there are also non-metallic components, whose lifetime can restrict the lifetime of a plant. In this chapter, lifetime prediction principles in case of concrete structures are also introduced.