Bueno Fillon, Luis(Universitat Politècnica de València, 2022-12-13)
[ES] Para garantizar la seguridad de un reactor nuclear es crucial la posibilidad de realizar
simulaciones con modelos que se asemejen a la realidad. El estudio de accidentes, la propuesta
de mejoras para la planta y ...
[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 ...
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 ...
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 ...
[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 ...
Álvarez Bestard, Yessica(Universitat Politècnica de València, 2020-08-13)
[ES] Desde siempre riesgo e incertidumbre han sido dos palabras muy relacionadas con el
mercado bursátil, sin embargo, han cobrado especial importancia en los últimos
tiempos. Los inversores tanto profesionales como ...
[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 ...
[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 ...
Vidal Ferràndiz, Antoni; Carlos Alberola, Sofía; Ginestar Peiro, Damián; Gallardo Bermell, Sergio(Universitat Politècnica de València, 2019-07-31)
[ES] En el grado de Ingenier´ıa de la Energ´ıa, los alumnos pueden cursar las asignaturas de Tecnolog´ıa Nuclear
y Seguridad Nuclear. En ambas asignaturas se estudia el dise˜no de un reactor nuclear para que la central
funcione ...
To simulate the behaviour of a nuclear power reactor it is necessary to be able to integrate the time-dependent neutron diffusion equation inside the reactor core. Here the spatial discretization of this equation is done ...
[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 ...
Carreño, A.; Vidal-Ferràndiz, Antoni; Ginestar Peiro, Damián; Verdú Martín, Gumersindo Jesús(UP4 Institute of Sciences, S.L., 2017)
[EN] Determination of the reactor kinetic characteristics is very important for the design and development of a new reactor system.
In this sense, the computation of lambda modes associated to a nuclear power reactor has ...
[EN] The mechanical vibrations of core internals such as fuel assemblies (FAs) cause oscillations in the neutron flux that require in some circumstances nuclear power plants to operate at a reduced power level. This work ...
Carlos Alberola, Sofía; Vidal Ferràndiz, Antoni; Verdú Martín, Gumersindo Jesús(Universitat Politècnica de València, 2016-06-28)
La geometría que más se asemeja al núcleo de un reactor de agua en ebullición es un cilindro, por lo que en el diseño de núcleos de reactores nucleares es interesante conocer la distribución de la población neutrónica en ...
[EN] The neutron transport equation describes the distribution of neutrons inside a nuclear reactor core. Homogenization strategies have been used for decades to reduce the spatial and angular domain complexity of a nuclear ...
[EN] Domain decomposition is a mature methodology that has been used to accelerate the convergence of partial differential equations. Even if it was devised as a solver by itself, it is usually employed together with Krylov ...
Lambda modes of a nuclear power reactor have interest in reactor physics since they have been used to
develop modal methods and to study BWR reactor instabilities. An h–p-Adaptation finite element method
has been implemented ...
[EN] Different spatial modes can be defined for the neutron diffusion equation such as the k; a and c-modes.
These modes have been successfully used for the analysis of nuclear reactor characteristics. In this work,
these ...
[EN] Nowadays, non-invasive detection of anomalies in nuclear power plants is possible through neutron
noise monitoring. The early detection of such anomalies gives the possibility to take proper actions
before they lead ...
[EN] The time-dependent neutron diffusion equation approximates the neutronic power evolution inside a nuclear reactor core. Applying a Galerkin finite element method for the spatial discretization of these equations leads ...