Description
There is a disturbed host rock zone adjacent to the ILW liner. The zone has an increased porosity, hydraulic conductivity and diffusivity and there may be chemical alteration due to the interaction with the concrete liner. This is not considered important because the hydraulic properties of the inside of the ILW tunnels (mortar, emplacement containers, waste) are significantly poorer than those of the EDZ.
OPA Category
Category as used in the OPA assessment
Concrete-HR interface (ILW)
OPA Number
Number as used in the OPA assessment
1.01
NEA V1 IFEP Reference(s)
Related IFEPs from the NEA V1 IFEP list from 1999
2.2.01