Nuclear power plant protection system-based safety accident protection method

Abstract

The invention discloses a safety accident protection method based on a nuclear power plant protection system. The reactor protection system generates two paths of automatic safety injection instruction signals at the same time, wherein the first path of automatic safety injection instruction signal is sent to an RS trigger of safety level software, and meanwhile the second path of automatic safetyinjection instruction signal is transmitted to an RS trigger of an ECP relay circuit; after the first path of automatic safety injection instruction signal is sent to an RS trigger of safety level software, the RS trigger of the safety level software is triggered to automatically carry out safety injection, preset delay is triggered to allow reset timing; and after the preset delay is finished, an operator is allowed to stop safety injection; and the second path of automatic safety injection instruction signal is transmitted to an RS trigger of the ECP relay circuit and then is subjected to logic OR processing with a manual safety injection instruction based on a relay, then safety injection is carried out after the RS trigger of the ECP relay circuit is triggered, and preset time delay is triggered to allow reset timing; finally, an operator is allowed to stop safety injection after the preset time delay is ended. The safety and economy of the nuclear power plant are improved.

Description

technical field [0001] The invention belongs to the technical field of nuclear power plant reactor instrumentation and control, in particular to a design method for related signals and functions of a reactor protection system. Background technique [0002] The main control room of the nuclear power plant is designed with an emergency control panel (ECP). The system-level protection function triggered by it bypasses the safety-level software through a hard logic circuit built on the basis of relays, so as to ensure that the superimposed automatic protection function fails or fails in emergency conditions. When triggered, operators can still bring the reactor into a safe state, preventing the release of radioactive material to the environment. [0003] Such as figure 1 As shown, when an accident occurs in a nuclear power plant, according to the accident regulations of the power plant, after the automatic safety injection of the reactor protection system is triggered, the oper...

AI Technical Summary

Problems solved by technology

In some cases, if the system-level safety instructions cannot be reset in time, the safety injection is still injected into the primary circuit with a large flow at this time, which may eventually cause the regulator to be full of water, making the accident more likely to worsen

Images