Glossary
Graphites and C/C Composites for Generation IV Nuclear Reactors

Coke

Residues from the distillation of organic compounds (petroleum, coal, oil shale, etc.) that can be used to produce carbon materials.

Graphitation (or graphitization)

Heat treatment (generally above 2,000°C) to obtain a carbon atom organization of precursor materials (cokes, polymers, chemical vapor deposition, etc.) that approximates the structure of graphite.

Tokamak

A toroidal or spherical enclosure that uses magnetic fields to confine plasma for nuclear fusion reactions.

Turnaround

This is the irradiation threshold above which graphite-based material undergoes expansion, after the volume contraction phase. This threshold also corresponds to a deterioration in mechanical properties.