Description

Freezing of the tunnel plugs is of no significance. When freezing due to permafrost growth starts, the repository is closed and saturated and the tunnel plugs have no performance requirement at this stage.

SKB Number

SKB FEP Number

Pg02

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, since this requires permafrost conditions. Intact canister, Long-term after saturation and "thermal" period: Neglected, since there are no long-term performance requirements on the plugs

References

Bibliographic references to obtain more information

SR-Site Buffer, backfill and closure process report, TR-10-47, Section(s) 2.4.3, 5.1.2