caa a22 4500 463162781 CHVBK 20180406164752.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1007/s11242-006-9066-3 doi (NATIONALLICENCE)springer-10.1007/s11242-006-9066-3 Modelling of radionuclide release from a concrete container [Elektronische Daten] [S. Bejaoui, J. Sercombe, C. Mugler, H. Peycelon] This study presents numerical simulations of radionuclides (RN) release from a concrete container performed with a chemo-transport model, which describes simultaneously radionuclides (RN) migration in concrete and concrete leaching. The mathematical description of leaching is based on the generalized transport equation of calcium in concrete. The equation is solved numerically using the CAST3M code. 2D simulations of concrete leaching with the possibility to account for the influence of cracking have been performed. A second transport equation has also been implemented in the CAST3M code to determine the extent of radionuclide diffusion in (partially) leached concrete. The radioactive decay and the retention of the RN in concrete are taken into account. Results show that leaching is particularly important for RN having long decay periods. The crack depth appears to be the most important geometric parameter (compared to the crack opening and the crack width) with respect to RN diffusion. Springer Science+Business Media, Inc., 2006 Concrete nationallicence Radionuclide nationallicence Release nationallicence Leaching nationallicence Cracking nationallicence Modelling nationallicence Φ : Porosity (m3m−3) nationallicence ρs : Solid phase mass volume-density (kgm−3) nationallicence C ca : Calcium concentration in the pore solution (molm−3) nationallicence S ca : Calcium concentration in the solid phase (molm−3) nationallicence C RN : Radionuclide concentration in the pore solution (molm−3) nationallicence K d : Radionuclide distribution coefficient (m3kg−1) nationallicence D ca : Effective diffusion coefficient of calcium (m2s−1) nationallicence D RN : Effective diffusion coefficient of radionuclide (m2s−1) nationallicence D HTO : Effective diffusion coefficient of tritium (m2 s−1) nationallicence t : Time (s) nationallicence T : Radionuclide half-life (year) nationallicence λ : Radionuclide decay constant (s−1) nationallicence Bejaoui S. CEA, DEN/DPC/SCCME/LECBA, bât 158, 91191, Gif sur Yvette, France aut Sercombe J. CEA, DEN/DTCD/SPDE/L2ED, bât 163, 13108, Saint-Paul-lez-Durance, France aut Mugler C. CEA, DSM/LSCE, bât 701, 91191, Gif sur Yvette, France aut Peycelon H. CEA, DEN/DPC/SCCME/LECBA, bât 158, 91191, Gif sur Yvette, France aut Transport in Porous Media Kluwer Academic Publishers 69/1(2007-08-01), 89-107 0169-3913 69:1<89 2007 69 11242 https://doi.org/10.1007/s11242-006-9066-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11242-006-9066-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bejaoui S. CEA, DEN/DPC/SCCME/LECBA, bât 158, 91191, Gif sur Yvette, France aut NATIONALLICENCE 700 1- Sercombe J. CEA, DEN/DTCD/SPDE/L2ED, bât 163, 13108, Saint-Paul-lez-Durance, France aut NATIONALLICENCE 700 1- Mugler C. CEA, DSM/LSCE, bât 701, 91191, Gif sur Yvette, France aut NATIONALLICENCE 700 1- Peycelon H. CEA, DEN/DPC/SCCME/LECBA, bât 158, 91191, Gif sur Yvette, France aut NATIONALLICENCE 773 0- Transport in Porous Media Kluwer Academic Publishers 69/1(2007-08-01), 89-107 0169-3913 69:1<89 2007 69 11242 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer