Reactor internal reliability analysis system and method based on data mining

Abstract

The invention discloses a reactor internal reliability analysis system and method based on data mining, and the method comprises the steps: building evaluation indexes in a modeling process through supervised learning, so as to measure the advantages and disadvantages of a model, and obtaining two types of modeling indexes for evaluating the reliability of a reactor internal; based on the determined indexes for evaluating the health state of the reactor internals, conducting dimension reduction processing on the collected data, and constructing service features for reliability evaluation; reconstructing a current sample into a sample set with time sequence based on the time sequence characteristic of the reactor internal operation state data, and establishing a model framework through a long-short-term memory recurrent neural network prediction method. The model training process is based on the prediction purpose, a cross entropy loss function and an Adam optimizer are selected, algorithm model parameters are searched, and the reliability of reactor internals is predicted. The method has high recognition precision and generalization ability, is good in performance, and is suitablefor health state recognition and reliability judgment of reactor internals.

Description

technical field [0001] The invention relates to state identification and fault diagnosis of reactor internal components, in particular to a data mining-based reliability analysis system and method for reactor internal components. Background technique [0002] The safety of the PWR nuclear power plant mainly depends on the safety of the primary circuit. According to nuclear safety regulations, all mechanical equipment and pipelines in the primary circuit belong to nuclear safety level 1 and earthquake resistance category 1. One of the main equipment of the primary circuit is the reactor pressure vessel. The components in the container are called internal components. The internal components of the reactor mainly include the lower support components of the core, the upper support components of the core, and the in-core measurement devices, etc. When the reactor is in operation, each component in the reactor is in a harsh environment such as high temperature, high pressure, c...

AI Technical Summary

Problems solved by technology

[0003] Recently, the design of reactor internals mostly relies on the method of determinism, which often leads to overly conservative design in some aspects, and the existing theories in other aspects have not been fully considered, and it is impossible to predict its complex operating conditions. The possible failures and their risk probabilities, resulting in the internal components of the reactor still not meeting the needs of actual engineering

Images