Experience from seismic check-ups of nuclear power plant components

The experience is discussed with seismic tests of technological equipment of conventional power plants exported from the Czechoslovak Socialist Republic to seismic regions which are being used at the Mochovce nuclear power plant. The calculation assessment of seismic resistance was made mainly at the SKODA enterprise. There are certain difficulties with experimental assessment because Czechoslovakia only has three large testing units and several small test stands. This mainly concerns electrical equipment, measurement systems and control system and air technology systems whose seismic resistance can only be tested experimentally. There are also unsolved problems concerning the classification of systems, namely to determine which systems are to be tested for seismic resistance and which are not. Breifly described are existing problems of seismic tests of equipment for the Temelin nuclear power plant. Next to the primary coolant circuit which as seismically resistant will be delivered from the USSR it will be necessary to test the seismic resistance of the live steam inlet tubing for the turbine, the condenser mounting, high- and low-voltage distribution systems, etc. (Z.M.). 15 refs