Verification of FAC prediction model in pipe wall thinning prediction software 'FALSET'. Part 2

Flow accelerated corrosion (FAC) and liquid droplet impingement erosion (LDI) are the main pipe wall thinning phenomena in piping system of power plants. At present, the management is based on thinning rate and residual lifetime evaluation using pipe wall thickness measurement results. For future improvement of the management, introduction of domestic prediction code is expected in Japan. We have developed original prediction software for pipe wall thinning 'FALSET', which predicts maximum thinning rate in each element in pipelines one-dimensionally by simplifying our prediction models for local thinning rate of FAC/LDI, and verified FALSET with FAC data in domestic PWR secondary system. In this study, FAC prediction model in FALSET was verified with FAC data added from previous verification and prediction accuracy at present was discussed. (author)