Nuclear waste disposal simulations: Couplex test cases

H. Hoteit, Philippe Ackerer*, R. Mosé

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

We give some results obtained for the Couplex test cases proposed by the ANDRA. In this paper our aim is twofold. Firstly, to compute the release of nuclides out of the repository by concentrating on the 3D near field (Couplex 2). The simulation of the transport phenomena takes into account the dissolution of the glass containers and congruent emissions of the radio-nuclides including filiation chains and some simplified chemistry. Secondly, it is to use the near field computations in order to simulate the nuclide migrations in a 2D far field (Couplex 3). Coupling in between the two simulations takes into consideration the periodicity of the disposal modules and the geometry of the repository described in Couplex 1. The mixed finite element and discontinuous Galerkin methods are used to solve the convection-diffusion equations. In order to handle the nonlinear precipitation/dissolution term, we developed a new iterative technique that combines Picard and Newton-Raphson methods.

Original languageEnglish (US)
Pages (from-to)99-124
Number of pages26
JournalComputational Geosciences
Volume8
Issue number2
DOIs
StatePublished - 2004
Externally publishedYes

Keywords

  • ANDRA-Couplex
  • Discontinuous Galerkin method
  • Flow and reactive transport in porous media
  • Mixed finite elements
  • Time splitting technique

ASJC Scopus subject areas

  • Computational Theory and Mathematics
  • Computer Science Applications
  • Earth and Planetary Sciences (miscellaneous)

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