Description

Localised swelling into fractures intersecting the deposition hole, which may lead to separation of individual montmorillonite layers, or small groups of mineral layers (dispersion).

SKB Number

SKB FEP Number

Bu18

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. Neglected if total cation charge is > 4mM. Otherwise modelled. Intact canister - Long-term after saturation and "thermal" period. Neglected if total cation charge is > 4mM. Otherwise modelled. Failed canister - Resaturation/ "thermal" period. Neglected since dose rate outside canister is too low to have any effect. Failed canister - Long-term after saturation and "thermal" period. The effect of a-radiation from nuclides from a failed canister is estimated. Intact canister - Earthquakes. Not specifically treated.

References

Bibliographic references to obtain more information

SR-Site Buffer, backfill and closure process report, TR-10-47, Section(s) 2.2.4, 3.5.11; SR-Site Main report, TR-11-01, Section(s) 7.4.3