Description
Concerns the impact of additives in the concrete plugs on microbial processes and consequences in terms of the production of sulphide, acid, gas and complexing agents.
SKB Number
SKB FEP Number
Pg17
Main Category
Main category for FEP
Internal process
System Component
System component to which the FEP applies
Tunnel plugs
Handling
Explanation of how the FEP is treated
Intact canister, Resaturation/ "thermal" period: Neglected under unsaturated conditions since the extent of aqueous reactions is limited. For saturated conditions the treatment is the same as for "long-term".
Intact canister, Long-term after saturation and "thermal" period: Microbial effects in tunnel plugs are included in the description of the geochemistry in the repository.
References
Bibliographic references to obtain more information
SR-Site Buffer, backfill and closure process report, TR-10-47, Section(s) 2.4.3, 5.4.9