Description

Changes in the rate of chemical reactions owing to the presence of a time-varying thermal gradient within the EBS.

Category

Category of FEP

Supercontainer EBS

Sub-category

Sub-category of FEP

Thermal processes

Ondraf Niras FEP Number

Ondraf Niras FEP Number

54

FEP Effects

Description of FEP Effects

The thermal pulse generated in the EBS by radioactive decay and exothermic reactions may cause rates of near-field processes to change. Processes that may be affected include corrosion, microbial activity, gas production, complex formation, colloid production, radionuclide solubility, sorption processes, and speciation. If sufficiently large thermal gradients exist, diffusion of heavier molecules to cooler regions (Soret effect) could occur.

NEA TN2 IFEP Reference(s)

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

Not specifically mentioned - perhaps covered by 2.3.1.4 Impact of thermal processes on other processes (waste package). 3.2.1.2 Impact of thermal processes on other processes (GDF).