1.1 D=Dead/Gravity Loads 1.2 Po=Normal Operating Pressure : 1/4inch water gage negative pressure. 1.3 Pa/Ta=Accident Condition Pressure / Temperature 1.4 DLF=Dynamic Load Factor for Accident Pressure : 2.0 1.5 Yf = Accident Flooding Loads shall be calculated considering the design basis flood height 1.6 E=Seismic Load(Safe Shutdown Earthquake(SSE))
2.1 Normal combination 1.0 D + 1.0Po 2.2 Extreme environmental condition 1.0 D + 1.0 Po + 1.0 ESSE 1.0 D + 1.0 Yf 2.3 Abnormal/Extreme environmental loading condition 1.0 D + 1.0 Pa +Ta 1.0 D + 1.0 ESSE + 1.0 Pa 1.0 D + 1.0 ESSE + 1.0 Ta 1.0 D + 1.0 ESSE + 1.0 Pa + 1.0 Ta 1.0 D + 1.0 Pa + 1.0 Ta + 1.0 Yf 1.0 D + 1.0 ESSE + 1.0 Pa + 1.0 Ta + 1.0Yf * NOTE : 상기의 Pa 값에 Dynamic Load Factor(DLF) 적용 Normal loading combination = 1.0 KEPIC SND Extreme environmental loading condition : the design allowable stress shall be the lesser of 1.6 x KEPIC SND or ; for flexure, 0.95Fy; for compression, 0.95Pcr (Pcr is the critical load for either elastic or inelastic structural stability (bucking) whichever governs); and for shear, 0.95 Fy / √3. 3. Safe Shutdown Earthquake - Damping Factor 4%