A t3 test circuit and optimization method of nuclear power plant reactor protection system

Abstract

The application discloses a T3 test loop of a reactor protection system in a nuclear power station and an optimization method thereof. In the optimization method, the T3 test loop employs parallel resistance to check current loop, and comprises a plurality of test switches, wherein at least one test switch is corresponding to a multiple paths of devices, and the at least one test switch has at least two pairs of contact in parallel connection to form parallel contacts. The application has the beneficial effects that: at least two pairs of contact in the test switches are in parallel output to drive the test loop and reduce the risk of maloperation caused by high failure rate of contacts; in one embodiment, nuclear grade relay nodes are connected into the test loop to further improve the reliability of the equipment; in another embodiment, self-locking of test signal is added for interlocking test signal in the case of switch contact failure to reduce the maloperation; and in another embodiment, additional alarm signal sent to a main control enables the normal operation and monitoring on the loop, in order to reduce the risk of refusal-operation caused by scheme optimization.

Description

technical field [0001] This application relates to nuclear radiation safety and monitoring technology, in particular to a T3 test circuit of a nuclear power plant reactor protection system and an optimization method thereof. Background technique [0002] A nuclear power plant is a power plant that uses the energy released by nuclear fission (Nuclear Fission) or nuclear fusion (Nuclear Fusion) reactions to generate electricity. [0003] In order to protect the health of the staff of the nuclear power plant and the residents around the nuclear power plant, the design, construction and operation of the nuclear power plant adopt the principle of defense in depth, providing multiple protections in terms of equipment and measures to ensure that the nuclear power plant can effectively control the output power of the reactor; and can In the event of various natural disasters, such as earthquakes, tsunamis, floods, etc., or man-made fires, explosions, etc., it can also ensure suffici...

AI Technical Summary

Problems solved by technology

For the T3 test with multiple test circuits, when carrying out the test of one protective circuit of a certain T3 test switch, only the circuit can be monitored, and the other test circuits carried by the switch cannot be monitored. Contact faults occur during the process and cannot be detected in time, and if there is an abnormality in the unmonitored circuit, it will cause the protection equipment to malfunction during the test

[0008] (2) The reliability of the T3 test switch is not high

However, considering the limited space in the on-site cabinet, it is impossible to add new equipment, and the T3 test switch is affected by the installation location, application experience, analysis and demonstration, etc., and the replacement problem cannot be solved in the short term

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