The Seismic design for nuclear facilities has been subject of complex analysis of the type usually performed for nuclear power plants. For the purpose of ensuring seismic safety for nuclear facilities with limited radioactive inventory, a simplified approach was adopted by the IAEA safety guides with emphasis on appropriate construction and detailing principles rather than sophisticated dynamic analysis. This work presents the equivalent static approach, with an application for a frame element, a dynamic analysis is also achieved using a computer program (DRAIN – 2DX) with real (time – history earthquake) for the purpose of comparison, the results lead to some observations and notes which have to be taken into account for the seismic safety design.