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The early earthquake warning system of the Armenian Nuclear Power Plant
Fridrikh Arakelyan, Hrahat Hakobyan
Abstract: The system has a substantial disadvantage: a signal from a seismic sensor triggers emergency protection at the moment of impact on the plant, which is conditioned by the location of the seismic sensors immediately next to the ANPP site. To eliminate this shortcoming an early earthquake warning system is planned, which is to be organised at the ANPP. The peculiarity of the system consists of the transmission of a seismic signal via radio waves, from registration points located at a certain distance from the plant, to the emergency protection system. Due to the difference in the velocities of seismic and radio waves, the radio waves reach the plant tens of seconds earlier than the seismic waves. This is of crucial importance for the increase in the reliability of the plant’s operation, because the start and initial stages of emergency shutdown will take place during the normal phase of operation. |