Modal methods for the neutron diffusion equation using different spatial modes

A Carreño, A Vidal-Ferràndiz, D Ginestar… - Progress in Nuclear …, 2019 - Elsevier
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 …

A novel mathematical model for two-energy groups of the point kinetics reactor dynamics

AE Aboanber, AA Nahla, ZI Al-Muhiameed - Progress in Nuclear Energy, 2014 - Elsevier
The point kinetics equations for reactor dynamic systems are normally described and treated
for one-energy group, which modeled as stiff coupled differential equations, and their …

Solution of the Lambda modes problem of a nuclear power reactor using an h–p finite element method

A Vidal-Ferrandiz, R Fayez, D Ginestar… - Annals of Nuclear Energy, 2014 - Elsevier
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 …

Stabilization of chains of linear parabolic PDE–ODE cascades

X Xu, L Liu, M Krstic, G Feng - Automatica, 2023 - Elsevier
Over the past decade, stabilization problems have been solved for various cascade and
“sandwich” configurations involving linear ODEs and PDEs of both hyperbolic and parabolic …

[HTML][HTML] Moving meshes to solve the time-dependent neutron diffusion equation in hexagonal geometry

A Vidal-Ferràndiz, R Fayez, D Ginestar… - Journal of computational …, 2016 - Elsevier
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 …

[PDF][PDF] Numerical techniques for the neutron diffusion equations in the nuclear reactors

AA Nahla, FA Al-Malki, M Rokaya - Adv. Stud. Theor. Phys, 2012 - m-hikari.com
The space-time neutron diffusion equations with multi-group of delayed neutrons are a
couple of the stiff nonlinear partial differential equations. The finite difference method is used …

[HTML][HTML] Adaptive time-step control for modal methods to integrate the neutron diffusion equation

A Carreño, A Vidal-Ferràndiz, D Ginestar… - Nuclear Engineering and …, 2021 - Elsevier
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 …

Spatial modes for the neutron diffusion equation and their computation

A Carreño, A Vidal-Ferràndiz, D Ginestar… - Annals of Nuclear …, 2017 - Elsevier
Different spatial modes can be defined for the neutron diffusion equation such as the λ, α
and γ-modes. These modes have been successfully used for the analysis of nuclear reactor …

Block hybrid multilevel method to compute the dominant λ-modes of the neutron diffusion equation

A Carreño, A Vidal-Ferràndiz, D Ginestar… - Annals of Nuclear …, 2018 - Elsevier
The dominant λ-modes associated with a nuclear reactor configuration describe the neutron
steady-state distribution and its criticality. Furthermore, they are useful to develop modal …

[HTML][HTML] Time-dependent simplified spherical harmonics formulations for a nuclear reactor system

A Carreño, A Vidal-Ferràndiz, D Ginestar… - Nuclear Engineering and …, 2021 - Elsevier
The steady-state simplified spherical harmonics equations (SP< mspacewidth=”− 0.3em”> N
equations) are a higher order approximation to the neutron transport equations than the …