Description

The investigation holes are filled with water and erosion will not take place after installation. There are no axial hydraulic gradients along the hole so there will be no axial water flow that can erode the bentonite.

SKB Number

SKB FEP Number

BhS06

Main Category

Main category for FEP

Internal process

System Component

System component to which the FEP applies

Borehole seals

Handling

Explanation of how the FEP is treated

Intact canister, Resaturation/ "thermal" period: Neglected since the holes are initially water filled and no gradients are expected. Intact canister, Long-term after saturation and "thermal" period: Neglected, since piping only occurs in the early part of the repository evolution.

References

Bibliographic references to obtain more information

SR-Site Buffer, backfill and closure process report, TR-10-47, Section(s) 2.8.3, 9.2.4