Current state of in-cabinet response spectra for seismic qualification of equipment in nuclear power plants

•Dynamic behavior of electrical cabinets and control panels.•Simplified Ritz-Vector approach for generating accurate in-cabinet response spectra (ICRS).•Computer program INCABS for generating in-cabinet response spectra (ICRS).•Effect of high frequency ground motion on in-cabinet response spectra.•Rotational stiffness of mounting arrangement in electrical cabinets and control panels.