Mass Transfer & Porous Media (MTPM) - Andra

P/MTPM/7Initial state with glass and canister0,250,200,150,10Concentration (mol/l)Initial canisterInitial glass0,050,000,0 0,2 0,4 0,6 Distance 0,8 (m) 1,0Evolution of the canisterEvolution of the glass0,250,250,200,150,10Concentration (mol/l)Initial1 Ms2 Ms3 Ms5 Ms10 Ms0,200,150,10Concentration (mol/l)initial glass4,5 Ms5 Ms10 Ms0,050,050,000,0 0,2 0,4 0,6 Distance 0,8 (m) 1,00,000,0 0,2 0,4 0,6 Distance 0,8 (m) 1,0Figure 1: Illustration on a simple 1-D case of the alteration of a waste package included in a canister. Theinitial situation is depicted in the top profile : the simulated glass is included in a canister that is thickeron the right side. The two figures below illustrate the evolution of the canister, dissolving progressivelyfrom the outside and when perforation is reached on the right side, allowing glass to begin to dissolve.References:Bengaouer, A., Montarnal, P., Loth, L. & Gaombalet, J. (2003) ALLIANCES Project: integration, analysisand design software environment for nuclear waste storage and disposal. Int. Conf. on Supercomputingin Nuclear Applications, 22-24 Sept. 2003, Paris, France.Bildstein, O., Trotignon, L., Perronnet, M. & Jullien, M. (2006) Modelling iron-clay interactions in deepgeological disposal conditions. Phys. Chem. Earth, 31, 618-625.Bildstein, O., Trotignon, L., Pozo C., Jullien M. (2007) Modelling glass alteration in an altered argillaceousenvironment, J. Nucl. Mat., in press: doi:10.1016/j.jnucmat.2007.01.225Page 436INTERNATIONAL MEETING, SEPTEMBER 17...>...18, 2007, LILLE, FRANCECLAYS IN NATURAL & ENGINEERED BARRIERSFOR RADIOACTIVE WASTE CONFINEMENT