Journal article Open Access

Putting together wavelet-based scaleograms and convolutional neural networks for anomaly detection in nuclear reactors

Thanos Tagaris; George Ioannou; Maria Sdraka; Georgios Alexandridis; Andreas Stafylopatis

A critical issue for the safe operation of nuclear power plants is to quickly and accurately detect possible anomalies and perturbations in the reactor. Defects in operation are principally identified through changes in the neutron flux, as captured by detectors placed at various points inside and outside of the core. While wavelet-based analysis of the measured signals has been thoroughly used for anomaly detection, it has yet to be coupled with deep learning approaches. To this end, this work presents a novel technique for anomaly detection on nuclear reactor signals through the combined use of wavelet-based analysis and convolutional neural networks. In essence, the wavelet transform is applied to the signals and the corresponding scaleograms are produced, which are subsequently used to train a convolutional neural network that detects possible perturbations in the reactor core. The overall methodology is experimentally validated on a set of simulated nuclear reactor signals generated by a well-established relevant tool. The obtained results indicate that the trained network achieves high levels of accuracy in failure detection, while at the same time being robust to noise.

Files (420.5 kB)
Name Size
2019_Tagaris_ICAAI2019_paper_V1.pdf
md5:ce079a4f0497ceaddc35b01d60b7babc
420.5 kB Download
13
26
views
downloads
Views 13
Downloads 26
Data volume 10.9 MB
Unique views 11
Unique downloads 26

Share

Cite as