Shaking Table Tests to Validate Inelastic Seismic Analysis Method Applicable to Nuclear Metal Components

The main purpose of this study is to perform shaking table tests validate the inelastic seismic analysis method applicable pressure-retaining metal components in nuclear power plants (NPPs). To do this, test mockup was designed and fabricated be able describe hot leg surge line nozzle with a piping system, which known one seismically fragile steam supply systems (NSSS). used input motions are displacement time histories corresponding design floor response spectrum at an elevation 136 ft in-structure building NPPs. Two earthquake levels study. One design-basis safe shutdown level (SSE, PGA = 0.3 g) other beyond-design-basis (BDBE, 0.6 g), linearly scaled from SSE level. measure strain responses, five gauges were attached expected critical locations target nozzle, three accelerometers installed system dynamic responses. From results tests, it found that plastic acceleration not amplified by as much two times because behavior significantly contributed energy dissipation during events. simulate results, elastoplastic analyses well-known Chaboche kinematic hardening model Voce isotropic for Type 316 stainless steel carried out, principal responses compared results. comparison, can give very reasonable when large enough invoke components.