The world's nuclear fleet in 1964
In 1964, 46 nuclear reactors were operating in 9 countries, 2.9 GWe net, with 42 under construction. 8 of those units are not included in the net capacity because no net figure has been published for them.
Compared with 1963, the operating fleet grew by 8 reactors. 8 reactors were connected to the grid that year, 1,186 MWe, mostly in Russia (3), Italy (2) and United Kingdom (2). 2 units were permanently shut down, 75 MWe. Sweden connected its first nuclear reactor in 1964. The countries with the most operating capacity were United Kingdom (1,249 MWe), United States (865 MWe) and Russia (304 MWe).
← Previous year, 1963 · Next year, 1965 → · See this year on the map · Today's rankings
Connected to the grid in 1964
| Unit | Country | Type | Model | MWe |
|---|---|---|---|---|
| Enrico Fermi |  Italy | PWR | Westinghouse 4-loop (WH 4LP) | 260 |
| Garigliano | Italy | BWR | BWR-1 | 150 |
| Beloyarsk 1 |  Russia | LWGR | AMB-100 | 102 |
| Novovoronezh 1-1 | Russia | PWR | V-210 | 197 |
| Siberian ADE-4 | Russia | LWGR | unknown | 167 |
| Agesta |  Sweden | PHWR | R3 | 10 |
| Hunterston A1 |  United Kingdom | GCR | Magnox | 150 |
| Hunterston A2 | United Kingdom | GCR | Magnox | 150 |
Shut down in 1964
| Unit | Country | Type | Model | MWe | Grid connection |
|---|---|---|---|---|---|
| Experimental Breeder Reactor 1 |  United States | — | unknown | 0 | 1951 |
| Hallam | United States | — | Liquid Metal-cooled, Graphite-Moderated Reactor (LMGMR) (LMGMR) | 75 | 1963 |
Countries by operating capacity in 1964
| # | Country | Reactors | MWe | Under construction |
|---|---|---|---|---|
| 1 | United Kingdom | 16 | 1,249 | 13 |
| 2 | United States | 13 | 865 | 7 |
| 3 | Russia | 7 | 304 | 2 |
| 4 | Italy | 2 | 303 | 1 |
| 5 |  France | 4 | 149 | 5 |
| 6 |  Canada | 1 | 22 | 1 |
| 7 |  Germany | 1 | 15 | 5 |
| 8 |  Belgium | 1 | 10 | — |
| 9 | Sweden | 1 | 10 | — |
| 10 |  India | 0 | 0 | 2 |
| 11 |  Japan | 0 | 0 | 2 |
| 12 |  Kazakhstan | 0 | 0 | 1 |
| 13 |  Slovakia | 0 | 0 | 1 |
| 14 |  Spain | 0 | 0 | 1 |
| 15 |  Switzerland | 0 | 0 | 1 |
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.