Gas Cooled Reactor (GCR)

GCRs are cooled with carbon dioxide and moderated with graphite.The core consists of graphite bricks with coolant channels, in which the fuel elements are contained. The core is confined in a steel or concrete pressure vessel. The turbine is driven by a secondary steam-water circuit.

GCRs are designed for on-load refuelling. GCRs are nearly exclusively operating in Great Britain (Magnox reactors).