| Gabriel VASILESCU1, Maria DIMA2, Denisa TUDOR3, Augustin SEMENESCU4
Abstract. Monitoring nuclear reactor instabilities during start-up and load-following operations challenges both nuclear security (reactivity control, shutdown margins) and industrial security (real-time anomaly detection, control loop integrity). Of the types of reactors most vulnerable to such unanticipated instabilities, pulsed research reactors and Small Modular Reactors (SMR’s) are at the forefront. This paper establishes a reactor-agnostic framework for real-time extraction of exogenous parameters suitable for Nonlinear Autoregressive Exogenous (NARX) neuromorphic predictors. I detail a real-time recursive Savitzky-Golay (SG) filter that updates polynomial coefficients ca. ×100 faster than the traditional method. The SG filter decouples exogenous drifts (control rods, coolant, pressurizer) from stochastic neutron noise. Synthetic SMR data shows parameter-swing windows, essential for NARX-based Tool-Augmented Generation (TAG) agents. Keywords: NARX, SMR, TAG, nuclear reactor instabilities, Savitzky-Golay filter DOI 10.56082/annalsarscieng.2026.1.31 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). 2Doctoral School – University of Petrosani, Petrosani, Romania (e-mail: mstsds@proton.me). 3Doctoral School – University of Petrosani, Petrosani, Romania (e-mail: deni_t.2301@yahoo.com). 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 |
