Description

Water transport in the tunnel backfill under unsaturated conditions because of a negative capillary pressure in the pores of the backfill that leads to water uptake from the surrounding rock.

SKB Number

SKB FEP Number

BfT03

Main Category

Main category for FEP

Internal process

System Component

System component to which the FEP applies

Backfill in tunnels

Handling

Explanation of how the FEP is treated

Intact canister - Resaturation/ "thermal" period. Buffer and backfill THM model. Intact canister - Long-term after saturation and "thermal" period. Not relevant by definition.

References

Bibliographic references to obtain more information

SR-Site Buffer, backfill and closure process report, TR-10-47, Section(s) 2.3.4, 4.2.1; SR-Site Main report, TR-11-01, Section(s) 7.4.4