Nuclear power plant earthquake shutdown protection system and method and nuclear power plant shutdown control system
A protection system and a technology for nuclear power plants, which are applied in the fields of nuclear power plant shutdown control systems and nuclear power plant earthquake shutdown protection systems, can solve the problems of high false alarm rate, difficulty in accurately setting the seismic acceleration peak threshold, and high missed alarm rate.
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Embodiment 1
[0033] This embodiment proposes a nuclear power plant earthquake shutdown protection system, including: accelerometer 10, speedometer 20, seismic data acquisition module 30, alarm logic judgment module 40, earthquake alarm module 50, accelerometer 10 and speedometer 20 placed At the same monitoring point, where:
[0034] The seismic data acquisition module 30 is connected with the accelerometer 10, the velocity meter 20, and the alarm logic judgment module 40 respectively, and is used for collecting the seismic acceleration electrical signal that the accelerometer 10 transmits, the seismic velocity electrical signal that the velocity gauge 20 transmits, and completes the modulus The seismic acceleration value and the seismic velocity value are obtained through conversion, and the seismic acceleration value and the seismic velocity value are sent to the alarm logic judgment module 40 .
[0035] The alarm logic determination module 40 is connected with the seismic data acquisiti...
Embodiment 2
[0042] This embodiment proposes a nuclear power plant earthquake shutdown protection system, such as Figure 4 As shown, include: two accelerometers 10, two speedometers 20, two seismic data acquisition modules 30, two alarm logic judgment modules 40, and earthquake alarm modules 50, wherein:
[0043] An accelerometer 10 and a speedometer 20 are combined together, installed on the foundation pier of the seismic free field (also called reference field) at the same monitoring point in the nuclear power plant area, to monitor the base seismic signal of the nuclear power plant area; another accelerometer 10 Combined with another speedometer 20, it is installed on the foundation pier of the seismic response field monitoring point above the 0-meter level of the nuclear reactor building foundation of the nuclear power plant to monitor the response of the nuclear reactor building of the nuclear power plant to the earthquake.
[0044] Each seismic data acquisition module 30 is connecte...
Embodiment 3
[0051] This embodiment proposes a nuclear power plant earthquake shutdown protection method, such as Figure 6 shown, including:
[0052] Step S101: receiving the acceleration value and velocity value sent by the seismic data acquisition module;
[0053] Step S102: judging whether the seismic acceleration value reaches the preset acceleration peak threshold;
[0054] Step S103: judging whether the seismic velocity value reaches the preset velocity peak threshold;
[0055] Step S104: When it is judged that the phase time difference between the first duration when the seismic acceleration value reaches the peak acceleration threshold and the second duration when the seismic velocity value reaches the peak velocity threshold is within the preset time threshold range, an alarm signal is sent to the earthquake alarm module.
[0056] The nuclear power plant earthquake shutdown protection method proposed by the present invention uses a seismic data acquisition module to synchronous...
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