부산대학교 도서관

This article presents a new design of earthquake instrumentation that is suitable for quick decisionmakingafter the seismic event at the nuclear power plant (NPP). The main objective of this work is toensure more availability of the NPP by expediting walk-down period when the seismic wave is incident. In general, the decision-making to restart the NPP after the seismic event requires more than 1 month ifan earthquake exceeds operating basis earthquake level. It affects to the plant availability significantly. Unnecessary shutdown can be skipped through quick assessments of operating basis earthquake, safeshutdown earthquake events, and damage status to structure, system, and components. Multidecisionparameters such as cumulative absolute velocity, peak ground acceleration, Modified Mercalli IntensityScale, floor response spectrum, and cumulative fatigue are discussed. The implementation scope on thefield-programmable gate array platform of this work is limited to cumulative absolute velocity, peakground acceleration, and Modified Mercalli Intensity. It can ensure better availability of the plant throughintegrated decision-making process by automatic assessment of NPP structure, system, and components.