Nuclear power plant reactor shutdown signal transmission system and method

Abstract

The invention, relating to the field of nuclear-power technology, particularly relates to a signal transmission system and a method of the reactor in nuclear station for triggered downtime when shutdown. The invention is characterized in that: when one of engineered safety device cabinet row A and B is damaged, for outputting shutdown signals under a two-out-of-three mechanism of a turbine protection system, two input ends of one of the three protection channels of the turbine protection system use the effectiveness of the switching signals from one of the row A and B as the sufficient condition of the effectiveness of the input signals; in the rest two protection channels, two input ends of the first protection channel use the effectiveness of the switching signals from one of the row A as the sufficient condition of the effectiveness of the input signals, and two ends of the other protection channel use the effectiveness of the switching signals from one of the row B as the sufficient condition of the effectiveness of the input signals.

Description

technical field [0001] The invention relates to the technical field of nuclear power, in particular to a nuclear power plant reactor shutdown signal transmission system and method. Background technique [0002] The reactor protection system is used to protect the integrity of the three major safety barriers of the nuclear reactor - the fuel cladding, the primary pressure boundary and the containment vessel. When the operating parameters reach the threshold that endangers the integrity of the three safety barriers, the reactor protection system will trigger the emergency shutdown of the reactor and activate the special safety facilities. [0003] Such as figure 1 As shown, the reactor protection system (RPS) includes the reactor protection cabinet (RPC) and the special safety facility cabinet (ESFAC). Two columns of A and B, each column outputs a plurality of switch signals corresponding to the multiple threshold calculation results, which are converted and input to the ste...

AI Technical Summary

Problems solved by technology

[0010] The disadvantage of this connection is that if only one column of A and B is damaged, for example, only column A is damaged, the failure of A1 will cause GSE-1 to output a failure signal, and the failure of A4 will cause GSE-3 to output a failure signal

Although both B7 and B6 are valid at this time, the output signal of GSE-2 is still valid, but under the above-mentioned three-select-two mechanism, the two output channels output failure signals, which will result in the inability to output shutdown signals

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