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