Description

The chemical effects on EBS behaviour and pore water chemistry of new products formed as the result of a corrosion reaction on the surface of a solid.

Category

Category of FEP

Supercontainer EBS

Sub-category

Sub-category of FEP

Chemical processes

Ondraf Niras FEP Number

Ondraf Niras FEP Number

19

FEP Effects

Description of FEP Effects

Identification of corrosion products, including the development of passivating layers, is important in assessing the possible wider effects on EBS performance of corrosion. For example, the formation of magnetite as the overpack corrodes could influence the dissolution rate of the waste and/or the migration of radiolytic oxidants formed near the waste surface, as well as chemical conditions in the buffer porewater. Supercontainer envelope corrosion products may affect chemical conditions in the buffer porewater.

NEA TN2 IFEP Reference(s)

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

2.3.4.12 Impact of chemical processes on other processes (waste package). 3.2.4.11 Impact of chemical processes on other processes (GDF).