Proactive Evaluation of Potential/Latent Degradation Phenomena for Light Water Reactor Structural Materials and System Safety
庄子 哲雄 Tetsuo SHOJI 竹田 陽一 Yoichi TAKEDA 国谷 治郎 Jiro KUNIYA
BWR Condition Monitoring Technology Long Term Operation LWR Plant Aging Proactive materials degradation management PWR Stress Corrosion Cracking System Safety
A Proactive Materials Degradation Management (PMDM) project has been carried out at the Fronti er Research Initiative (FRI), New Industry Creation Hatchery Center, Tohoku University for 5 ye ars, as a part of a Nuclear Industries Safety Agency (NISA) project that was originally formed in 2007 to define an Aging Management Program that addresses unexpected structural material fa ilures in Light Water Reactors (LWRs). Such a program required, therefore, the development of a life prediction capability for specific combinations of degradation modes, structural materia ls, and reactor components. In this paper, proactive evaluation of potential/latent degradatio n phenomena for LWR structural materials and it's relation to the system safety are introduced.