Community Research and Development Information Service - CORDIS

FP7

Modelling Pressurized Water Reactor cores in terms of porous media

Funded under: FP7-EURATOM

Abstract

The aim of this study is to develop a tractable model of a nuclear reactor core taking the complexity of the structure (including its nonlinear behaviour) and fluid flow coupling into account. The mechanical behaviour modelling includes the dynamics of both the fuel assemblies and the fluid. Each rod bundle is modelled in the form of a deformable porous medium; then, the velocity field of the fluid and the displacement field of the structure are defined over the whole domain. The fluid and the structure are first modelled separately, before being linked together. The equations of motion for the structure are obtained using a Lagrangian approach and, to be able to link up the fluid and the structure, the equations of motion for the fluid are obtained using an arbitrary Lagragian Eulerian approach. The finite element method is applied to spatially discretize the equations. Simulations are performed to analyse the effects of the characteristics of the fluid and of the structure. Finally, the model is validated with a test involving two fuel assemblies, showing good agreement with the experimental data.

Additional information

Authors: RICCIARDI G, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);COLLARD B, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);BELLIZZI S, LMA CNRS, Marseille (FR);COCHELIN B, LMA CNRS, Marseille (FR)
Bibliographic Reference: An article published in: Journal of Fluids and Structures, Volume 25, Issue 1, 2009, pp. 112-133
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://dx.doi.org/doi:10.1016/j.jfluidstructs.2008.04.002
Record Number: 200910322 / Last updated on: 2009-09-22
Category: PUBLICATION
Original language: en
Available languages: en