PCI rapid analysis method and device based on neural network, electronic equipment and storage medium

Abstract

The invention relates to a PCI rapid analysis method and device based on a neural network, electronic equipment and a storage medium. The method comprises the steps that steady-state power and first transient power in the power history of a nuclear reactor fuel rod are extracted for PCI preliminary analysis to obtain a preliminary PCI analysis result and a last steady-state result, transient characteristic parameters corresponding to the transient power are obtained, and corresponding sensitive characteristic parameters are obtained through sensitivity analysis; initial neural networks are established, and sensitive characteristic parameter corresponding values of the steady-state power and the first transient power are input; the output target is a preliminary PCI analysis result, the network is trained to obtain a target network on the premise of meeting the training times, and after the target network is obtained, the corresponding values of the sensitive characteristic parameters of the steady-state power and the second transient power are obtained as the input of the target network, and calculation is performed to obtain a final output result. By implementing the method, the PCI analysis result of the nuclear reactor can be simply, quickly and accurately obtained.

Description

technical field [0001] The invention relates to the technical field of nuclear reactor application, and more specifically, relates to a neural network-based PCI rapid analysis method, device, electronic equipment and storage medium. Background technique [0002] During the power-up transient process of the reactor, due to the different degrees of expansion of the fuel rod pellets and the cladding, the pellet-cladding interaction (PCI) may occur, causing the cladding to be in a state of high stress and strain, resulting in cladding damage . [0003] There are 157 sets of PWR core fuel assemblies, each containing 264 fuel rods. Considering the symmetry, the 1 / 8 core 26-box assembly has a total of 6864 fuel rods. Existing PCI thermomechanical calculations need to analyze the fuel’s behavior after being subjected to multiple transients under different operating conditions one by one. It is estimated that more than one million analysis cases are required for a specific power pl...

AI Technical Summary

Problems solved by technology

A single calculation example needs to include many parameters such as steady state and transient power, model parameters, fuel size parameters, fluence, coolant flow, etc. Therefore, it takes huge computing resources to complete the PCI analysis of a certain power plant at this stage

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