Description
Transport of gas through the tunnel backfill, air during the resaturation phase and repository generated hydrogen gas in longer time perspectives.
SKB Number
SKB FEP Number
BfT05
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. (Through dissolution).
Failed canister - Resaturation/ "thermal" period. Neglected, since gas volumes (from buffer) assumed to be too low to reach backfill during this period.
Failed canister - Long-term after saturation and "thermal" period. Neglected, pessimistically since transport would delay radioactive releases and decrease buffer pressure. The backfill would act as a sink for gas.
References
Bibliographic references to obtain more information
SR-Site Buffer, backfill and closure process report, TR-10-47, Section(s) 2.3.4, 4.2.3; SR-Site Main report, TR-11-01, Section(s) 7.4.4