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Browsing by Author "Carreño Sánchez, Amanda María"

Now showing items 1-20 of 26

A block Arnoldi method for the SPN equations

Vidal-Ferràndiz, Antoni; Carreño, Amanda; Ginestar Peiro, Damián; Verdú Martín, Gumersindo Jesús (Taylor & Francis, 2020-02-01)

[EN] The simplified spherical harmonics equations are a useful approximation to the stationary neutron transport equation. The eigenvalue problem associated with them is a challenging problem from the computational point ...
A finite element method for neutron noise analysis in hexagonal reactors

Vidal-Ferràndiz, Antoni; Ginestar Peiro, Damián; Carreño, Amanda; Verdú Martín, Gumersindo Jesús; Demazière, C. (EDP Sciences, 2021-02-22)

[EN] The early detection of anomalies through the analysis of the neutron noise recorded by in-core and ex-core instrumentation gives the possibility to take proper actions before such problems lead to safety concerns or ...
A multigrid method to compute the dominant lambda modes of a nuclear reactor

Carreño, Amanda; Vidal-Ferràndiz, Antoni; Ginestar Peiro, Damián; Verdú Martín, Gumersindo Jesús (International Center for Numerical Methods in Engineering (CIMNE), 2017-07-05)

[EN] High accuracy is required for the solution of the lambda modes problem associated with the neutron diffusion equation. In this work, a multigrid method based on finite element method has been proposed to solve this ...
A time and frequency domain analysis of the effect of vibrating fuel assemblies on the neutron noise

Vidal-Ferràndiz, Antoni; Carreño, Amanda; Ginestar Peiro, Damián; Demazière, C.; Verdú Martín, Gumersindo Jesús (Elsevier, 2020-03)

[EN] 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 a reduced power level. This work ...
Adaptive modal methods to integrate the neutron diffusion equation

Carreño, Amanda; Vidal-Ferràndiz, Antoni; Ginestar Peiro, Damián; Verdú Martín, Gumersindo Jesús (R. Company, J. C. Cortés, L. Jódar and E. López-Navarro, 2019-07-12)
Adaptive time-step control for modal methods to integrate the neutron diffusion equation

Carreño, Amanda; Vidal-Ferràndiz, Antoni; Ginestar Peiro, Damián; Verdú Martín, Gumersindo Jesús (Elsevier, 2021-02)

[EN] The solution of the time-dependent neutron diffusion equation can be approximated using quasi-static methods that factorise the neutronic flux as the product of a time dependent function times a shape function that ...
Adaptive time-step control for the modal method to integrate the multigroup neutron diffusion equation

Carreño, Amanda; Vidal-Ferràndiz, Antoni; Ginestar Peiro, Damián; Verdú Martín, Gumersindo Jesús (EDP Sciences, 2021-02-22)

[EN] The distribution of the power inside a reactor core can be described by the time dependent multigroup neutron diffusion equation. One of the approaches to integrate this time-dependent equation is the modal method, ...
Análisis de la evolución de la potencia debida al movimiento de barras de control en un reactor nuclear para la verificación del código FEMFFUSION

Candela Botí, Pablo (Universitat Politècnica de València, 2021-10-18)

[ES] Para el análisis de la seguridad de un reactor nuclear, es necesario simular de manera muy precisa la evolución de la potencia del reactor a lo largo del tiempo. El valor de la potencia del reactor depende de múltiples ...
Block hybrid multilevel method to compute the dominant lambda-modes of the neutron diffusion equation

Carreño, A.; Vidal-Ferràndiz, Antoni; Ginestar Peiro, Damián; Verdú Martín, Gumersindo Jesús (Elsevier, 2018)

[EN] The dominant lambda-modes associated with a nuclear reactor configuration describe the neutron steady-state distribution and its criticality. Furthermore, they are useful to develop modal methods to study reactor ...
Block Preconditioning Matrices for the Newton Method to Compute the Dominant lambda-Modes Associated with the Neutron Diffusion Equation

Carreño, Amanda; Bergamaschi, Luca; Martinez, Angeles; Vidal-Ferràndiz, Antoni; Ginestar Peiro, Damián; Verdú Martín, Gumersindo Jesús (MDPI AG, 2019-03)

[EN] In nuclear engineering, the lambda-modes associated with the neutron diffusion equation are applied to study the criticality of reactors and to develop modal methods for the transient analysis. The differential ...
Block strategies to compute the lambda modes associated with the neutron diffusion equation

Carreño, Amanda; Vidal Ferrándiz, Antoni; Ginestar Peiró, Damián; Verdú, Gumersindo (Editorial Universitat Politècnica de València, 2022-05-11)

[EN] Given a configuration of a nuclear reactor core, the neutronic distribution of the power can beapproximated by means of the multigroup neutron diffusion equation. This is an approximationof the neutron transport ...
Edge-wise perturbations to model vibrating fuel assemblies in the frequency-domain using FEMFFUSION: development and verification

Vidal-Ferràndiz, Antoni; Carreño, Amanda; Ginestar Peiro, Damián; Verdú Martín, Gumersindo Jesús (Elsevier, 2022-09-15)

[EN] The mechanical vibrations of fuel assemblies have shown to give high levels of neutron noise, triggering in some circumstances the necessity to operate nuclear reactors at a reduced power level. This behaviour can be ...
Frequency-domain models in the SPN approximation for neutron noise calculations

Carreño, Amanda; Vidal-Ferràndiz, Antoni; Ginestar Peiro, Damián; Verdú Martín, Gumersindo Jesús (Elsevier, 2022-06)

[EN] Simulations of the neutron flux fluctuations, known as neutron noise, can be performed by means of the spherical harmonics equations (SPN) approximation with higher accuracy than with the diffusion equation. In this ...
HP Finite element method for the simplified Pn equations

Vidal-Ferràndiz, Antoni; Carreño, Amanda; Ginestar Peiro, Damián; Verdú Martín, Gumersindo Jesús (International Center for Numerical Methods in Engineering (CIMNE), 2017-07-05)

[EN] The simplified spherical harmonics approximation to the neutron transport equation defines the neutron distribution inside a nuclear reactor core more accurately than the widely used neutron diffusion equation. To ...
Incorporación de la plataforma Kahoot en las clases de matemáticas II y evaluación de su funcionamiento

Carreño, Amanda; Ginestar, Damián; Sanabria-Codesal, Esther (Editorial Universitat Politècnica de València, 2021-04-21)

[ES] En este trabajo se presenta la experiencia de introducir la herramienta Kahoot en las sesiones de prácticas de informática de la asignatura Matemáticas II de la titulación del grado de Ingeniería Electrónica y Automática ...
Integration methods for the time dependent neutron diffusion equation and other approximations of the neutron transport equation

Carreño Sánchez, Amanda María (Universitat Politècnica de València, 2020-06-01)

[ES] Uno de los objetivos más importantes en el análisis de la seguridad en el campo de la ingeniería nuclear es el cálculo, rápido y preciso, de la evolución de la potencia dentro del núcleo del reactor. La distribución ...
Localizing Perturbations in Pressurized Water Reactors Using One-Dimensional Deep Convolutional Neural Networks

Pantera, Laurent; Stulík, Petr; Vidal-Ferràndiz, Antoni; Carreño, Amanda; Ginestar Peiro, Damián; Ioannou, George; Tasakos, Thanos; Alexandridis, Georgios; Stafylopatis, Andreas (MDPI AG, 2022-01)

[EN] This work outlines an approach for localizing anomalies in nuclear reactor cores during their steady state operation, employing deep, one-dimensional, convolutional neural networks. Anomalies are characterized by the ...
Modal methods for the neutron diffusion equation using different spatial modes

Carreño, A.; Vidal-Ferràndiz, Antoni; Ginestar Peiro, Damián; Verdú Martín, Gumersindo Jesús (Elsevier, 2019-08)

[EN] The behaviour of the neutrons inside a nuclear reactor core can be modelled by using the time dependent neutron diffusion equation. Different time schemes have been used to integrate this equation. One possibility is ...
Modelling and simulations of reactor neutron noise induced by mechanical vibrations

Vidal-Ferràndiz, Antoni; Ginestar Peiro, Damián; Carreño, Amanda; Verdú Martín, Gumersindo Jesús; Dokhane, A.; Verma, V.; Perin, Y.; Herb, J.; Mylonakis, A.; Demazière, Christophe; Vinai, P. (Elsevier, 2022-11)

[EN] Mechanical vibrations of core internals are among the main perturbations that induce oscillations in the neutron flux field, also known as neutron noise. In this work, different simulation models for the study of the ...
Multilevel matrix-free preconditioner to solve linear systems associated with a the time-dependent SPN equations

Carreño, Amanda; Vidal-Ferràndiz, Antoni; Ginestar, Damián; Verdú, Gumersindo (Editorial Universitat Politècnica de València, 2022-05-11)

[EN] The evolution of the neutronic power inside of a nuclear reactor core can be approximated by means of the diffusive time-dependent simplified spherical harmonics equations (SPN). For the spatial discretization of ...