Description
Concerns the formation of open channels or gaps in the crushed rock backfill in the central area by inflowing groundwater and the erosion of fine particles along the so created pipes.
SKB Number
SKB FEP Number
CA06
Main Category
Main category for FEP
Internal process
System Component
System component to which the FEP applies
Central area
Handling
Explanation of how the FEP is treated
Intact canister, Resaturation/ "thermal" period: Piping in the crushed rock cannot be excluded. However, the central area is always assumed to be a part of the repository with high hydraulic conductivity.
Intact canister, Long-term after saturation and "thermal" period: Piping in the crushed rock cannot be excluded. However, the central area is always assumed to be a part of the repository with high hydraulic conductivity.
References
Bibliographic references to obtain more information
SR-Site Buffer, backfill and closure process report, TR-10-47, Section(s) 2.5.3, 6.2.4