Nuclear power plant reactor protection system

Abstract

The invention relates to a nuclear power plant reactor protection system, comprising a steam turbine protection system and a reactor anticipation transient protection system, wherein the reactor anticipation transient protection system is used for generating an action of controlling the steam turbine protection system during accident conditions; the steam turbine protection system comprises at least three protection channels used for responding a reactor anticipation transient protection signal and generating an action signal for steam turbine stopping protection; a control switch is connected to the reactor anticipation transient protection system and used for distributing the reactor anticipation transient protection signal to each protection channel of the steam turbine protection system; and the steam turbine protection system further comprises a logic control module connected to each protection channel and used for safely stopping a steam turbine when two or more protection channels work. In the nuclear power plant reactor protection system, the unwanted operation rate and the failure operation rate of the interlocking protection action of the reactor anticipation transient protection system and the steam turbine protection system can be maintained to be optimal.

Description

technical field [0001] The invention relates to the technical field of nuclear power, and more specifically relates to a nuclear power plant reactor protection system. Background technique [0002] The protection method of the reactor protection system for accident conditions is mainly emergency shutdown. When the emergency shutdown protection fails, for example, when the parameter reaches the emergency shutdown protection threshold, no emergency shutdown protection signal is generated, or although the emergency shutdown The reactor signal, but the emergency shutdown circuit breaker is not disconnected, and various expected transients that occur are called ATWT (Anticipated Transients without Trip) reactor expected transients. [0003] Reactor Anticipated Transient (ATWT) protection system is a barrier of nuclear reactor protection system, which can effectively enhance the diversity and diversification of nuclear reactor protection functions. ATWT protection system action wi...

AI Technical Summary

Problems solved by technology

The steam turbine protection system adopts double-row protection channels, and the action of any row will trigger the shutdown protection of the steam turbine. The protection logic is too simple, and the safety and reliability are not high. It is likely to cause false tripping of the steam turbine protection system, thereby affecting the economic performance of the nuclear power plant.

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