Fault capability decision using a methodical data collection related to NPP siting

Korean peninsular has been considered as reasonably stable and safe tectonic region from earthquake, unlike the western US and Japan, however recently occured earthquakes recording moderate magnitudes near Korean NPP sites have been raising national concerns for the safety of the power plants. Therefore, this paper suggests using a methodical, and/or systematic data collection for surface fault capability decision related to NPP Site. This includes location and distance from the site, nature of country rocks, detected and/or calculated fault extension (length), photos and illustration of the fault outcrop(s) with sampling points for the age dating on, orientations (fault planes and striations) and sense of movement, size of displacement and width of the fault zone (e.g., gouge, fractured zone), micro-structural analysis results of the fault gouge, and geologic ages. This also turned out to be applicable from the test on the Ipsil fault near Kyungju, Korea