Online monitoring and online protection calculation method and system applicable to core of large pressurized water reactor

Abstract

The present invention relates to the field of nuclear safety, and in particular relates to an online monitoring and online protection calculation method and system applicable to the core of a large pressurized water reactor. The method comprises: on the basis of the ranges of key operating state parameters of a core, selecting a typical operating state parameter combination; receiving real-time measurement data of the operating state parameters; on the basis of the selected operating state parameter combination and the core state at a current moment t0, calculating a plurality of sets of intermediate coefficients so as form an intermediate coefficient library including the plurality of sets of intermediate coefficients; then, using the formed intermediate coefficient library to perform fast protection calculation; meanwhile, on the basis of the current operating state parameters measured in real time and the core state at the current moment t1, calculating a set of intermediate coefficients, and after the calculation is completed, using the set of intermediate parameters to perform fast monitoring calculation. The system comprises: a measurement system, an upper-layer unit and a lower-layer unit, wherein the upper-layer unit comprises a fine tracking calculation module and a fast monitoring calculation module, and the lower-layer unit comprises a fast protection calculation module. The present invention realizes the accurate and efficient calculation of key safety parameters of an online protection system, thereby improving the operational flexibility and economy of a nuclear power plant unit which has a pressurized water reactor core.

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