Introduction of NIMS Signal Analysis Method in NPP

Abstract

The NIMS, NSSS(nuclear steam supply system) Integrity Monitoring System, is designed to provide an integrated approach that includes areas of monitoring relevant to the integrity of NSSS. The NIMS is an integrated system that
monitors the NSSS for loose parts at natural collection zones, coolant steam leakage and pipe crack propagation at potential leak and crack regions, vibration of the reactor core components(core support barrel, fuel assembly, etc.)
and reactor coolant pump and motor vibration levels, pump shaft displacement(orbits) and RPM. This paper is intended to introduce the NIMS signal analysis methods using in nuclear power plant.