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Listar por palabra clave "Lambda modes"

Mostrando ítems 1-7 de 7

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 ...
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 ...
Lambda modes comparison for different approximations of the neutron transport equation: Diffusion, SN and SP3

Morató-Rafet, Sergio; Kochunas, B.; Miró Herrero, Rafael; Verdú Martín, Gumersindo Jesús; Larsen, E. W.; Downar, T. (Elsevier, 2021-05)

[EN] The methods presented in this paper solve the Simplified Spherical Harmonics approximation to the mul- tidimensional neutron transport equation. 1D, 2D and 3D systems were modeled with Cartesian geome- try using the ...
Modal decomposition method for BWR stability analysis using Alpha-modes

Verdú Martín, Gumersindo Jesús; Ginestar Peiro, Damián (Elsevier Masson, 2014-05)

[EN] In-phase and out-of-phase oscillations have been observed in BWR reactors. To improve the safety of these reactors it is necessary to detect in a reliable way these oscillations from the neutronic signals. In this ...
Multilevel method to compute the lambda modes of the neutron diffusion equation

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

Vidal Ferràndiz, Antoni; Fayez Moustafa Moawad, Ragab; Ginestar Peiro, Damián; Verdú Martín, Gumersindo Jesús (Elsevier Masson, 2014-10)

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 ...
Updating the Lambda modes of a nuclear power reactor

González Pintor, Sebastián; Ginestar Peiro, Damián; Verdú Martín, Gumersindo Jesús (PERGAMON-ELSEVIER SCIENCE LTD, 2011)

[EN] Starting from a steady state configuration of a nuclear power reactor some situations arise in which the reactor configuration is perturbed. The Lambda modes are eigenfunctions associated with a given configuration ...