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