Seismic Analysis Study of the HP Turbine Steam Supply Piping for APR1400

The high pressure (HP) turbine steam supply piping for APR1400 (Korea’s advanced power reactor 1400 MW-class) is routed from the Containment Building to the Turbine building via the Main Steam Isolation Valve Room in the Auxiliary building and supported by multiple structures. As such, the seismic analysis utilizing the Independent Support Motion (ISM) is preferable to the Enveloped Response Spectrum (ERS) method which is overly conservative but...