Description

The flow and transport of non-radioactive gases and radioactive gases, and the entrainment of gaseous or volatile radionuclides in gas flow.

Category

Category of FEP

Supercontainer EBS

Sub-category

Sub-category of FEP

Hydraulic processes

Ondraf Niras FEP Number

Ondraf Niras FEP Number

45

FEP Effects

Description of FEP Effects

Gas generated in the EBS will dissolve in the pore water and will be transported away from the GDF by diffusion as dissolved species. If the gas generation exceeds the capacity for diffusive transport of dissolved gas, a free gas phase will be formed, leading to a gas pressure build-up and eventually to gas breakthrough.

Reference(s)

References Relevant to FEP

RD&D Plan , section 4.2.2.5

NEA TN2 IFEP Reference(s)

Related IFEPs from the NEA TN2 List of Proposed IFEP Revisions [NEA/RWM/R(2013)8]

2.3.7.6 Gas dissolution (waste package). 2.4.2.1 Gaseous wastes. 2.5.3 Gas-mediated transport (waste package). 3.3.3 Gas-mediated transport (GDF).