Description
In principle, the same processes are operative in hardened, water-saturated cement paste or concrete as in clay, see FEP Bu11. Solutes can be transported in stagnant porewater by diffusion, following concentration gradients. The process leads to redistribution of dissolved porewater constituents (including radionuclides) in the porewater. The diffusion process is strongly coupled to nearly all chemical processes in the concrete, since it accounts for transport of reactants to and reaction products from the processes.
SKB Number
SKB FEP Number
BP09
Main Category
Main category for FEP
Internal process
System Component
System component to which the FEP applies
Bottom plate in deposition holes
Handling
Explanation of how the FEP is treated
Intact canister, Resaturation/ "thermal period: Neglected since advection is likely to dominate, if transport occurs at all.
Intact canister, Long-term after saturation and "thermal" period: Neglected since advection is likely to dominate, if transport occurs at all.
References
Bibliographic references to obtain more information
SR-Site Buffer, backfill and closure process report, TR-10-47, Section(s) 2.7.3, 8.4.2