Reactor type
Gas-cooled (GCR / AGR)
Cooled by carbon dioxide and moderated by graphite, the British Magnox and AGR reach high steam temperatures but low power density.
Operating
9
of 50 built or planned
Capacity
4,690 MWe
Countries
2
Units
| Unit | Country | Model | Status | MWe | Connection |
|---|---|---|---|---|---|
| Heysham B1 |  United Kingdom | AGR | Operating | 620 | 1989 |
| Heysham B2 | United Kingdom | AGR | Operating | 620 | 1989 |
| Torness 2 | United Kingdom | AGR | Operating | 605 | 1989 |
| Hartlepool A2 | United Kingdom | AGR | Operating | 595 | 1989 |
| Torness 1 | United Kingdom | AGR | Operating | 595 | 1988 |
| Hartlepool A1 | United Kingdom | AGR | Operating | 590 | 1989 |
| Heysham A2 | United Kingdom | AGR | Operating | 575 | 1989 |
| Dungeness B1 | United Kingdom | AGR | Shut down | 545 | 1985 |
| Dungeness B2 | United Kingdom | AGR | Shut down | 545 | 1989 |
| Bugey 1 |  France | UNGG | Shut down | 540 | 1972 |
| Hunterston B2 | United Kingdom | — | Shut down | 495 | 1977 |
| Hunterston B1 | United Kingdom | — | Shut down | 490 | 1976 |
| Wylfa 1 | United Kingdom | Magnox | Shut down | 490 | 1971 |
| Wylfa 2 | United Kingdom | Magnox | Shut down | 490 | 1972 |
| Heysham A1 | United Kingdom | AGR | Operating | 485 | 1989 |
| Hinkley Point B1 | United Kingdom | — | Shut down | 485 | 1978 |
| Vandellos 1 |  Spain | UNGG | Shut down | 480 | 1972 |
| Hinkley Point B2 | United Kingdom | — | Shut down | 480 | 1976 |
| Saint-Laurent A-2 | France | UNGG | Shut down | 465 | 1971 |
| Saint-Laurent A-1 | France | UNGG | Shut down | 390 | 1969 |
| Chinon A-3 | France | UNGG | Shut down | 360 | 1966 |
| Hinkley Point A1 | United Kingdom | — | Shut down | 235 | 1965 |
| Hinkley Point A2 | United Kingdom | — | Shut down | 235 | 1965 |
| Dungeness A1 | United Kingdom | Magnox | Shut down | 225 | 1965 |
| Dungeness A2 | United Kingdom | Magnox | Shut down | 225 | 1965 |
| Oldbury A1 | United Kingdom | — | Shut down | 217 | 1967 |
| Oldbury A2 | United Kingdom | — | Shut down | 217 | 1968 |
| Sizewell A1 | United Kingdom | — | Shut down | 210 | 1966 |
| Sizewell A2 | United Kingdom | — | Shut down | 210 | 1966 |
| Trawsfynydd 1 | United Kingdom | Magnox | Shut down | 195 | 1965 |
| Trawsfynydd 2 | United Kingdom | Magnox | Shut down | 195 | 1965 |
| Chinon A-2 | France | UNGG | Shut down | 180 | 1965 |
| Latina |  Italy | Magnox | Shut down | 153 | 1964 |
| Hunterston A1 | United Kingdom | — | Shut down | 150 | 1964 |
| Hunterston A2 | United Kingdom | — | Shut down | 150 | 1964 |
| Berkeley 1 | United Kingdom | Magnox | Shut down | 138 | 1962 |
| Berkeley 2 | United Kingdom | Magnox | Shut down | 138 | 1962 |
| Tokai 1 |  Japan | Magnox | Shut down | 137 | 1966 |
| Bradwell 1 | United Kingdom | — | Shut down | 123 | 1962 |
| Bradwell 2 | United Kingdom | Magnox | Shut down | 123 | 1962 |
| Chinon A-1 | France | UNGG | Shut down | 70 | 1964 |
| Calder Hall 1 | United Kingdom | Magnox | Shut down | 49 | 1956 |
| Calder Hall 4 | United Kingdom | Magnox | Shut down | 49 | 1959 |
| Chapelcross 1 | United Kingdom | Magnox | Shut down | 48 | 1959 |
| Chapelcross 2 | United Kingdom | Magnox | Shut down | 48 | 1959 |
| Chapelcross 3 | United Kingdom | Magnox | Shut down | 48 | 1959 |
| Marcoule G3 | France | — | Shut down | 40 | 1960 |
| Marcoule G2 | France | — | Shut down | 39 | 1959 |
| Windscale AGR | United Kingdom | — | Shut down | 24 | 1963 |
| Nyongbyon 1 |  North Korea | Magnox (Pu-production) | Operating | 5 | 1985 |