On the survivability of NPP technological on-line control systems under earthquakes

The purpose of the paper is to formulate principles of providing survivability of NPP technological process on-line control systems under seismic effects, that is principles of providing performance of the system with assigned quality indices under earthquakes and after them under all conditions of NPP failures of components of technological process on line control systems, methods for forcasting reliability and main reliability and main methods for improving system reliability under seismic effects are analyzed. It is proved that fulfilment of seismic stability requirements dosen't lead to sufficient rise in the system price, because the most expensive measures are required for other types of accidents with main NPP equipment