Generation IV meaning

In practice, Generation IV describes advanced nuclear reactor concepts relevant to licensing, safety cases, environmental permitting, procurement and financing. The term is descriptive and not defined in UK or Irish legislation or case law. The Generation IV International Forum (GIF) co‑ordinates six reference designs, including sodium‑cooled fast, very‑high‑temperature, gas‑ or lead‑cooled fast, molten‑salt and supercritical‑water reactors. Global deployment is generally expected from the 2030s onwards; none are licensed or operating in the UK or Ireland. In the UK, some Generation IV types fall within the government’s Advanced Modular Reactor (AMR) policy (including a proposed HTGR demonstrator in the early 2030s). Any project would require a nuclear site licence (Nuclear Installations Act 1965), Generic Design Assessment by the Office for Nuclear Regulation, and environmental permits from the relevant regulators. Planning consent is devolved; the Scottish Government currently opposes new nuclear power stations. In Northern Ireland there is no civil nuclear generation. In Ireland, legislation prohibits the construction of nuclear fission electricity generating stations, so the term is used mainly in cross‑border regulatory, waste and radiological‑protection contexts. Usage is otherwise broadly consistent across England & Wales, Scotland, Northern Ireland and Ireland.