Description
Desaturation of EDZ occurs due to i) ventilation and degassing during the operational phase and ii) gas generation and suction exerted by bentonite during the post-closure phase. Resaturation of EDZ occurs due to the presence of a hydraulic gradient and due to gas dissolution. The duration of the desaturation and saturation periods may have significant effects on other safety-relevant processes (canister corrosion, waste dissolution, etc.).
OPA Category
Category as used in the OPA assessment
Bentonite-HR interface
OPA Number
Number as used in the OPA assessment
2.01
Waste Relevance
Classes of waste to which this FEP is relevant
SF/HLW
NEA V1 IFEP Reference(s)
Related IFEPs from the NEA V1 IFEP list from 1999
2.1.08, 2.2.01, 2.1.12