Analysis of the PHWR benchmark transient using a high-order spherical harmonics-nodal collocation method and treatment of rod cusping effect
| Autor: | C.F. Talavera, Damián Ginestar, M.T. Capilla, Gumersindo Verdú |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Discretization
020209 energy Energy Engineering and Power Technology Time-dependent neutron transport equation 02 engineering and technology 010501 environmental sciences INGENIERIA NUCLEAR 01 natural sciences Homogenization (chemistry) Collocation method Rod cusping effect Convergence (routing) 0202 electrical engineering electronic engineering information engineering Nodal collocation method Applied mathematics Safety Risk Reliability and Quality Waste Management and Disposal 0105 earth and related environmental sciences Mathematics Scalar (physics) Spherical harmonics Spherical harmonics method Multidimensional PL equations Nuclear Energy and Engineering Node (circuits) Transient (oscillation) MATEMATICA APLICADA |
| Zdroj: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia instname |
| Popis: | [EN] We develop and validate node homogenization methods, based on one and three-dimensional node equivalent problems, that improve the volume weighted method for the treatment of the rod cusping effect. The numerical implementation of these techniques in a numerical approach based on general spherical harmonics, nodal collocation method, for arbitrary odd order ¿¿, and fully implicit time discretization, is verified on the AECL-7236 PHWR benchmark transient, showing the validity and convergence of the P1 and P3 approximations and the ability of the method to give accurate results for the relative power and scalar flux when a coarse spatial mesh combined with advanced homogenization techniques is used. Partial support to perform this work has been received by the Spanish Agencia Estatal de Investigación under project ENE201789029PAR. The authors thank the anonymous reviewers for their comments and suggestions. |
| Databáze: | OpenAIRE |
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