Nuclear power station reactor protection system and safety control method therein
A technology for a nuclear power plant reactor and protection system, which is applied in the field of nuclear power plant reactor protection system and safety control, can solve the problems of complex protection system maintenance and regular test plans and high degree of system coincidence
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Embodiment 1
[0052] Hereinafter, the nuclear power plant reactor protection system provided by this embodiment will be described with reference to the accompanying drawings. figure 1 It is a schematic structural diagram of a nuclear power plant reactor protection system provided by Embodiment 1 of the present invention.
[0053] Such as figure 1 As shown, the reactor protection system 100 of a nuclear power plant mainly includes an emergency shutdown system (Reactor Trip System, RTS) 10, a dedicated drive system (Engineering Safety Features Actuation System, ESFAS) 20, a safety automation system (Safety Automation System, SAS) 30 and a safety-level ring network SB (Safety System Bus) 40.
[0054] The emergency shutdown system 10 has the following functions: when a design basis accident occurs during the operation of the reactor, it will trigger the shutdown of the reactor to realize the control of the reactivity of the reactor, the discharge of residual heat from the primary circuit, and ...
Embodiment 2
[0067] On the basis of the first embodiment, this embodiment further improves the reactor protection system of the nuclear power plant in the prior art.
[0068] In the prior art, the control sequence for the second-generation pressurized water reactor nuclear power plant is generally only divided into two columns A and B, and the nuclear-level DCS platform is designed with the structure of two columns A and B accordingly. However, with the introduction of the third-generation PWR nuclear power plant, the third-generation PWR nuclear power plant is divided into three control sequences, therefore, the two-column control sequence design of the nuclear power plant reactor protection system in the prior art cannot meet the requirements of the third-generation PWR nuclear power plant. Require.
[0069] For this reason, the dedicated drive system 20 provided in this embodiment is divided into more than three ESFAS sequences, preferably three ESFAS sequences. As described in Embodim...
Embodiment 3
[0076] On the basis of the first or second embodiment above, this embodiment is used to further describe the emergency shutdown system 10 .
[0077] The N protection channels of the emergency shutdown system 10 are connected point-to-point, and each protection channel obtains threshold value comparison results from other N-1 protection channels. Such as figure 1 As shown, RPC-I obtains threshold comparison results from RPC-II to RPC-IV.
[0078] Each protection channel has a hot-standby redundant processor (not shown), and the hot-standby redundant processor obtains a third partial shutdown signal according to the comparison results of N thresholds from the N protection channels. Each protection channel is connected to a shutdown circuit breaker, and the shutdown circuit breaker obtains a third partial shutdown signal from each protection channel, and executes the third partial shutdown signal to control the shutdown of the nuclear power plant.
[0079] More specifically, ea...
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