| Gabriel VASILESCU1, Maria DIMA2, Costică BEJINARIU3, Augustin SEMENESCU4
Abstract. Neutron noise-stochastic flux fluctuations in reactor core assemblies encodes mechanical vibrations, coolant dynamics, and tampering events. Extracting security-relevant features with neuromorphic software is cutting edge monitoring technology for SMR’s and pulsed neutron sources. Here I propose an improved oversampled FFT to refine frequency resolution and amplitude estimation of mechanical resonances (0.001 – 100 Hz), mitigating picket-fence effects of phase-noised signals. Additionally, I propose capturing non-stationary transients (accidental reactivity insertions, void collapse) with running wavelet-transforms at user-defined frequencies. These spectral and transient features can subsequently be encoded into event streams for NARX predictors. Nuclear Security enhancement (fuel movement, control rod tampering) and Industrial Security monitoring (spent fuel pools, cask storage) are first line applications of the improvements – with the possibility to construct 2D spectral evolution and animated spectro-temporal playback (planned). Keywords: Neutron noise, oversampled FFT, wavelet transform, neuromorphic computing, nuclear security, industrial security, spiking neural networks. DOI 10.56082/annalsarscieng.2026.2.48 Read full article 1Senior Researcher I, Habil. PhD, Eng., National Institute for Research and Development in Mine Safety and Protection to Explosion, Chief Laboratory of Explosives Materials and Pyrotechnic Articles – INCD INSEMEX of Petrosani, Petrosani, Romania (e-mail: dragos.vasilescu@insemex.ro). 2University of Petrosani, Petrosani, Romania (e-mail: mstsds@proton.me). 3Professor, PhD, Eng., Materials Engineering and Industrial Safety Department, Faculty of Materials Science and Engineering, Vice Dean, Gheorghe Asachi Technical University of Iasi, Iasi, Romania (e-mail: costica.bejinariu@academic.tuiasi.ro). 4Professor, PhD, Eng. Mat. Ec.,National Science and Technology University Politehnica Bucharest, Bucharest, Romania, Member of Academy of Romanian Scientists; (e-mail: augustin.semenescu@upb.ro). |
PUBLISHED in Annals Academy of Romanian Scientists Series on Engineering Sciences
ISSN PRINT 2066 – 6950 ISSN ONLINE 2066 – 8570 |
