Description

Piping and erosion of the backfill in tunnels due to local buildup of water pressure in intersecting fractures.

SKB Number

SKB FEP Number

BfT06

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. Quantitative estimate with an empirical model. Intact canister - Long-term after saturation and "thermal" period. Not relevant. See also BfT16.

References

Bibliographic references to obtain more information

SR-Site Buffer, backfill and closure process report, TR-10-47, Section(s) 2.3.4, 4.2.4; SR-Site Main report, TR-11-01, Section(s) 7.4.4