Description

The modification of chemical speciation or phase change owing to microbial / biological / biochemical activity. Microbes may survive under likely alkaline conditions and areas of enhanced microbial activity may develop.

Category

Category of FEP

Supercontainer EBS

Sub-category

Sub-category of FEP

Chemical processes

Ondraf Niras FEP Number

Ondraf Niras FEP Number

28

FEP Effects

Description of FEP Effects

Metabolites of microbes may form complexes with some radionuclides. Dissolved in the porewater, these metabolites may decrease sorption and increase solubility of the radionuclides concerned. If a high organic load arises, the carbon dioxide produced may affect the properties of the buffer.

NEA TN2 IFEP Reference(s)

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

2.3.5.1 Microbial growth and poisoning (waste package). 2.3.5.2 Microbially/biologically mediated processes (waste package). 3.2.5.1 Microbial growth and poisoning (GDF). 3.2.5.2 Microbially/biologically mediated processes (GDF).