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