Protection exit method for million-kilowatt digital nuclear power plant reactor

Abstract

The invention relates to a protection exit method for a million-kilowatt digital nuclear power plant reactor. A reactor protection system comprises a data collection and processing unit and a logic operation unit, wherein the data collection and processing unit carries out linear conversion, filtering and threshold calculation on signals, then, the processed signals are transmitted to the logic operation unit for carrying out voting logic operation, the logic operation unit is connected with an executing mechanism and is in charge of the action logic management of the executing mechanism, signals generated by the logic operation unit are firstly isolated before the overhaul of a nuclear power plant, and the isolation is removed after the overhaul completion. The protection exit method for the digital nuclear power plant reactor has the advantages that the overhaul construction period is shortened by at least 5 to 10 days, and the misoperation risk of the equipment in the overhaul period is possibly reduced.

Description

technical field [0001] The invention belongs to the key technology in the reactor of a mega-kilowatt digital nuclear power plant, and in particular relates to a method for protecting and exiting a digital nuclear power plant reactor before a mega-kilowatt nuclear power plant is overhauled. Background technique [0002] The reactor protection system (RPS system) of Ling Ao Phase II adopts DCS integration technology, and all reactor protection logics are implemented in software, which are directly output to hardware devices after software calculations to drive on-site actuator actions. Since the RPS system of Ling Ao Phase II adopted DCS integration technology during design, once the power is cut off, it will cause the outage of some necessary equipment and there is no demand for the RPS system to be withdrawn and put into operation. Therefore, the RPS of Ling Ao Phase II The system does not have a formal exit and commissioning plan. Due to the online RPS system, a large amou...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the RPS system that adopts DCS integration technology does not have a formal withdrawal and commissioning plan at the time of design, so a large number of maintenance work cannot be carried out at the same time during the overhaul period, which greatly prolongs the defect of the maintenance period. Provides a method for protecting and exiting a mega-kilowatt digital nuclear power plant reactor

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