Nuclear power plant reactor core fuel assembly refueling monitoring method and system

Abstract

The invention is applicable to the key technical field of a million kilowatt level advanced pressurized water reactor nuclear power plant, and discloses a nuclear power plant reactor core fuel assembly refueling monitoring method and system, and the method comprises the following steps: capturing a fuel assembly, reading out initial height data of an encoder; calculating theoretical height data for correct position of the fuel assembly; positioning the fuel assembly and reading out actual height data of the encoder; using a computation module to compare the actual height data and the theoretical height data, and if a difference value is greater than a set deviation value, generating an alarm reminding. According to the nuclear power plant reactor core fuel assembly refueling monitoring method and system, whether the fuel assembly is properly installed can be accurately known, different lengths of different fuel assemblies may not interfere, and the method and system can ensure that the fuel assembly can be correctly located on a lower grid plate of a reactor core, further can ensure that the phenomenon that the fuel assembly is taken up by an upper cover can be avoided, completely eradicates safety accidents caused by the phenomenon, and are high in reliability and safety.

Description

technical field [0001] The invention belongs to the key technical field of a million-kilowatt advanced pressurized water reactor nuclear power plant, and in particular relates to a refueling monitoring method and system for core fuel assemblies of a nuclear power plant. Background technique [0002] A nuclear power plant is a power plant that uses the energy released by nuclear fission or fusion reactions to generate electricity. In order to protect the health of the nuclear power plant staff 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 be able to In the event of various natural disasters, such as earthquakes, tsunamis, floods, etc., or man-made fires, explosions, etc., it can also ensure sufficient coo...

AI Technical Summary

Problems solved by technology

[0004] 1. The irradiation growth effect of fuel assemblies leads to inconsistencies in the actual length of each fuel assembly;

[0005] 2. Different types of fuel assemblies have inconsistent design lengths, for example, the fuel assemblies of type AFA2G and fuel assemblies of type AFA3G have different lengths;

[0006] 3. There may be foreign matter in the grid plate under the core, and there is uncertainty in the height of the fuel assembly after it is in place

At present, when an over / under load situation occurs, the operator can only roughly estimate the interference area through an original fuel assembly simulation board, which is neither accurate nor intuitive, and is inefficient

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