Description
Gas processes in the plugs are only relevant for the saturation period and only for the bentonite part of the plug.
SKB Number
SKB FEP Number
Pg05
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: THM model.
Intact canister, Long-term after saturation and "thermal" period: Neglected - any effect from the plugs on gas migration would be positive, since they could act as sinks. However, the effect is impossible to quantify.
Failed canister, Resaturation/ "thermal" period: Assumed to be a part of the tunnel with high hydraulic conductivity (no failures are expected this period).
Failed canister, Long-term after saturation and "thermal" period: Assumed to be a part of the tunnel with high hydraulic conductivity.
References
Bibliographic references to obtain more information
SR-Site Buffer, backfill and closure process report, TR-10-47, Section(s) 2.4.3, 5.2.3