On the influence of dynamical fuel assembly deflections on the neutron noise level

M Viebach, N Bernt, C Lange, D Hennig… - Progress in Nuclear …, 2018 - Elsevier
KWU pressurized water reactors, the neutron flux is measured with in-core and the ex-core
detectors. Investigating the signal fluctuations of these detectors at fixed burnup, periods of …

PARCS vs CORE SIM neutron noise simulations

N Olmo-Juan, C Demazière, T Barrachina… - Progress in Nuclear …, 2019 - Elsevier
In a nuclear reactor, even operating at full power and steady-state conditions, fluctuations
are detected in the recording of any process parameter. These fluctuations (also called …

[HTML][HTML] Development and verification of a methodology for neutron noise response to fuel assembly vibrations

D Chionis, A Dokhane, L Belblidia, H Ferroukhi… - Annals of Nuclear …, 2020 - Elsevier
Nuclear reactors are stochastic systems, in which several parameters fluctuate even during
steady-state conditions. In addition, structural components like fuel assemblies, vibrate due …

[HTML][HTML] Studies of reactor noise response to vibrations of reactor internals and thermal-hydraulic fluctuations in PWRs

V Verma, D Chionis, A Dokhane, H Ferroukhi - Annals of Nuclear Energy, 2021 - Elsevier
This work is a contribution towards the development of computational methods that allow
investigation and prediction of reactor noise response due to in-core perturbations such as …

A time and frequency domain analysis of the effect of vibrating fuel assemblies on the neutron noise

A Vidal-Ferràndiz, A Carreño, D Ginestar… - Annals of Nuclear …, 2020 - Elsevier
The mechanical vibrations of fuel assemblies have been shown to give rise to high levels of
neutron noise, triggering in some circumstances the necessity to operate nuclear reactors at …

Modeling and simulation of neutron noise triggered by fuel assembly vibrations in 3D hexagonal geometry

A Kamkar, M Abbasi, O Safarzadeh - Nuclear Engineering and Design, 2023 - Elsevier
Neutron noise is a natural phenomenon in nuclear reactors. Hence, its investigation plays a
significant role in nuclear reactor physics and safety-related issues. While neutron noise …

Development of a calculation model to simulate the effect of bowing of the VVER-1000 reactor fuel assembly on power distribution

J Vosoughi, N Vosoughi, AA Salehi - Annals of nuclear energy, 2023 - Elsevier
Abstract The Lateral deformation of Fuel Assembly (FA) under the operational conditions of
the reactor cores is called FA bowing. This phenomenon is caused by factors such as …

[PDF][PDF] Deep learning-based anomaly detection in nuclear reactor cores

T Tasakos, G Ioannou, V Verma… - Proceedings of the …, 2021 - cortex-h2020.eu
In this work, a methodology is proposed for the classification of different perturbation types
and their position in a nuclear reactor core. More specifically, it is based on a Convolutional …

Neutron noise analysis of simulated mechanical and thermal-hydraulic perturbations in a PWR core

LA Torres, D Chionis, C Montalvo, A Dokhane… - Annals of Nuclear …, 2019 - Elsevier
Abstract KWU pre-Konvoi PWRs (SIEMENS design) are commonly exhibiting high neutron
noise levels which can lead to costly operational issues (ie activation of SCRAM system …

Intelligent techniques for anomaly detection in nuclear reactors

G Ioannou, T Tagaris, G Alexandridis… - EPJ web of …, 2021 - epj-conferences.org
The safe operation of nuclear power plants is highly dependent on the ability of quickly and
accurately identifying possible anomalies and perturbations in the reactor. Operational …