Design of all important safety-related plant sections of a nuclear facility from a technical and constructional point of view so that the reactor shuts down safely, is maintained in the shutdown condition, the residual heat is safely removed and the impermissible release of radioactive substances into the environment can be prevented. The design basis earthquake is the earthquake of maximum intensity for the location which, according to scientific knowledge, may occur in a region of up to 200 km taking all historical earthquakes which might have affected the site into account. The design basis earthquake is determined using data on the maximum acceleration and duration of the vibrations to be expected due to the local seismic conditions.