Sensitivity analysis for floor response spectra of nuclear reactor buildings

Against the reactor building of a 1000 MW Pressurized Water Reactor (PWR) nuclear station, the influence of the change of dynamic shear modulus of foundation soil on the floor response spectra of nuclear reactor building at a site of hard soil is investigated by considering soil-structure interaction (SSI). The sensitivity of the floor acceleration response spectra of the reactor building to the change of dynamic parameters of foundation soil is quantitatively analyzed, which may provide a reliable method and an important reference to evaluate the anti seismic safety of nuclear reactor buildings on similar sites of hard soil. (authors)