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%