Nuclear reactors supplied by UK Atomic Energy Authority
UK Atomic Energy Authority is recorded as the nuclear steam supply system (NSSS) supplier of 10 units in 1 country, per the IAEA PRIS register: none operating and 10 shut down.
Calder Hall, Chapelcross and Britain's fast reactor prototypes. By country: United Kingdom (10). By technology: 9 GCR and 1 FBR. The first unit was connected in 1956 and the most recent in 1963. 10 units have been permanently shut down.
PRIS supplier codes: UKAEA · Reference · Names per IAEA, Nuclear Power Reactors in the World 2025, table 25
Units with a UK Atomic Energy Authority nuclear steam supply system
| Unit | Country | Type | Model | MWe | Grid connection | Status |
|---|---|---|---|---|---|---|
| Calder Hall 1 |  United Kingdom | GCR | Magnox | 50 | 1956 | Shut down |
| Calder Hall 2 | United Kingdom | GCR | Magnox | 50 | 1957 | Shut down |
| Calder Hall 3 | United Kingdom | GCR | Magnox | 50 | 1958 | Shut down |
| Calder Hall 4 | United Kingdom | GCR | Magnox | 50 | 1959 | Shut down |
| Chapelcross 1 | United Kingdom | GCR | Magnox | 48 | 1959 | Shut down |
| Chapelcross 2 | United Kingdom | GCR | Magnox | 48 | 1959 | Shut down |
| Chapelcross 3 | United Kingdom | GCR | Magnox | 48 | 1959 | Shut down |
| Chapelcross 4 | United Kingdom | GCR | Magnox | 48 | 1960 | Shut down |
| Dounreay DFR | United Kingdom | FBR | unknown | 11 | 1962 | Shut down |
| Windscale AGR | United Kingdom | GCR | AGR | 24 | 1963 | Shut down |
Data: Global Energy Monitor (CC BY 4.0), IAEA PRIS 2025, Wikipedia (CC BY-SA), Wikidata and Wikimedia Commons. Capacities in net MWe unless stated.
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