| 摘要 |
PROBLEM TO BE SOLVED: To provide a nuclear power plant which starts various kinds of plant protection operations before the arrival of a seismic ground motion (an earthquake wave: an S wave) by using earthquake signals such as an earthquake early warning (EEW) to cut down or reduce a residual risk due to an earthquake. SOLUTION: The nuclear power plant in the present invention starts various kinds of plant protection operations in the plant by using earthquake signals such as an EEW. The nuclear power plant is characterized in that it has a receiving means 11 for receiving an earthquake signal (a) such as the EEW or earthquake information from seismometers near the seismic focus, a seismic intensity determination means 12 for determining whether the seismic intensity of the earthquake from the received earthquake signal (a) such as the EEW exceeds a prescribed one or not and a plant protection means 13 for starting the plant protection operations before the arrival of the seismic ground motion if the seismic intensity of the earthquake from the earthquake signal (a) such as the EEW exceeds the prescribed one. COPYRIGHT: (C)2009,JPO&INPIT
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