Reactor protection system in-service inspection device

Abstract

The invention relates to a reactor protection system in-service inspection device based on an NI (National Instrument) technique. Each row of corresponding reactor protection systems is configured; the reactor protection system in-service inspection device comprises an industrial personal computer and an in-service inspection interface circuit; an independent in-service inspection interface circuit is arranged for each channel of each row of the reactor protection systems; the in-service inspection interface circuits are respectively positioned in corresponding in-service inspection cases andcomprise low-voltage power supplies, T2 inspection control inserts, T3 inspection control inserts, T2 inspection inserts and T3 inspection inserts; and the in-service inspection cases are connected with the industrial personal computer through digital signal processing modules. By adopting the device, reactors do not need to be powered off, operation states of a reactor protection system can be monitored on line, and the device is simple in inspection operation, short in inspection cycle and high in accuracy and reliability.

Description

technical field [0001] The invention relates to a periodic test technology of a reactor protection system, in particular to an in-service inspection device for a reactor protection system based on NI technology. Background technique [0002] The function of the in-service inspection device is to check whether the function of the protection system is normal at any time during the normal operation of the reactor protection system equipment, and to detect possible faults in time. In various normal operations, it will not cause malfunction or refusal of the protection system. [0003] At present, the periodic tests of the reactor protection system are mostly carried out after the reactor is shut down or need to be bypassed. The inspection period of the reactor shutdown is long, which is not conducive to timely detection of problems in the protection system. Setting up a bypass will make the structure of the inspection device complicated. In addition, the fault judgment method o...

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Problems solved by technology

[0003] At present, the periodic tests of the reactor protection system are mostly carried out after shutdown or require bypass. The inspection period for shutdown is long, which is not conducive to timely detection of problems in the protection system. Setting bypass will make the structure of the inspection device complicated.

In addition, the fault judgment method of the regular test of the existing reactor protection system is to sample the signal level near the midpoint of the return pulse, and judge whether the return signal is correct by the signal level. The anti-interference ability of this method and the accuracy of the inspection There are deficiencies that need to be improved and improved

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