Description

Swelling of the buffer and other stress-strain-related processes that can cause mass redistribution within the buffer, namely thermal expansion, creep and a number of interactions with the canister, near field rock and the backfill.

SKB Number

SKB FEP Number

Bu08

Main Category

Main category for FEP

Internal process

System Component

System component to which the FEP applies

Buffer

Handling

Explanation of how the FEP is treated

Intact canister - Resaturation/ "thermal" period. Buffer and backfill THM modelling including interaction buffer/backfill and thermal expansion. System model (final swelling). Intact canister - Long-term after saturation and "thermal" period. Integrated evaluation of erosion, convergence, corrosion products, creep, swelling pressure changes due to ion exchange and salinity, canister sinking. Intact canister - Earthquakes. Part of integrated assessment of buffer/canister/rock.

References

Bibliographic references to obtain more information

SR-Site Buffer, backfill and closure process report, TR-10-47, Section(s) 2.2.4, 3.4.1; SR-Site Main report, TR-11-01, Section(s) 7.4.3