Description

Swelling and mass redistribution of the backfill in tunnels including thermal expansion, creep and interactions with the buffer, the rock and tunnel plugs.

SKB Number

SKB FEP Number

BfT07

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. THM modelling including interaction buffer/backfill and homogenisation in tunnel. Intact canister - Long-term after saturation and "thermal" period. Integrated evaluation of erosion, convergence, creep, swelling pressure changes due to ion exchange and salinity and transformation.

References

Bibliographic references to obtain more information

SR-Site Buffer, backfill and closure process report, TR-10-47, Section(s) 2.3.4, 4.3.1; SR-Site Main report, TR-11-01, Section(s) 7.4.4