납-고무 베어링(LRB) 면진시스템을 적용한 원전주제어실의 진동대 실험

Experimental Study on Floor Isolation of Main Control Room of Nuclear Power Plant using LRB (Lead Rubber Bearing)

In this study, we made two types of main control room floor systems (Type I, Type II) and several shaking table tests with and without isolation system were conducted to evaluate floor isolation effectiveness of LRB(Lead Rubber Bearing). Both type showed large difference according to input earthquake signals, but showed little difference according to floor type. It is required to make LRB of which design frequency is below 1Hz when applied to main control room of NPP, but considering much difficulties in making such LRB, it is recommended that consideration should be taken into account when applied to main control room of NPP.