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Gas-cooled reactor meaning
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What does Gas-cooled reactor mean?
A gas-cooled reactor is a nuclear reactor that uses a gas (typically carbon dioxide or helium) as the coolant to remove heat from the core. In UK and Irish legal practice it is a descriptive, cross‑sector term used in nuclear licensing, environmental permitting, planning, safety and decommissioning documents, rather than a term generally defined in primary legislation or case law. UK examples include Magnox and Advanced Gas-cooled Reactors (AGRs).
Legal significance includes: identifying the reactor type in the safety case for a nuclear site licence (regulated in Great Britain by the Office for Nuclear Regulation under the Nuclear Installations Act 1965); informing environmental permit conditions and discharge limits set by the relevant environmental regulator; shaping emergency preparedness and public information duties; and determining decommissioning strategy, spent fuel and radioactive waste management. The term also distinguishes these facilities from water‑cooled reactors in guidance and processes such as generic design assessment and licence condition compliance.
Usage is broadly consistent across England and Wales, Scotland and Northern Ireland. Ireland does not operate nuclear power stations; the term may arise in radiological protection, transport and cross‑border emergency planning contexts.
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