The world's nuclear fleet in 2006
In 2006, 442 nuclear reactors were operating in 32 countries, 378.2 GWe net, with 28 under construction. 2 of those units are not included in the net capacity because no net figure has been published for them.
Compared with 2005, the operating fleet shrank by 5 reactors. 2 reactors were connected to the grid that year, 1,482 MWe: Tianwan 1-1 (China) and Tarapur 3 (India). 8 units were permanently shut down, 2,235 MWe. The countries with the most operating capacity were United States (103,782 MWe), France (63,260 MWe) and Japan (47,635 MWe).
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Connected to the grid in 2006
| Unit | Country | Type | Model | MWe |
|---|---|---|---|---|
| Tianwan 1-1 |  China | PWR | V-428 | 1,000 |
| Tarapur 3 |  India | PHWR | IPHWR-540 | 482 |
Shut down in 2006
| Unit | Country | Type | Model | MWe | Grid connection |
|---|---|---|---|---|---|
| Kozloduy 3 |  Bulgaria | PWR | VVER-440 (V-230) | 408 | 1980 |
| Kozloduy 4 | Bulgaria | PWR | VVER-440 (V-230) | 408 | 1982 |
| Bohunice 1 |  Slovakia | PWR | VVER-440 (V-230) | 408 | 1978 |
| Jose Cabrera 1 |  Spain | PWR | Westinghouse 1-loop (WH 1LP) | 141 | 1968 |
| Dungeness A1 |  United Kingdom | GCR | Magnox | 225 | 1965 |
| Dungeness A2 | United Kingdom | GCR | Magnox | 225 | 1965 |
| Sizewell A1 | United Kingdom | GCR | Magnox | 210 | 1966 |
| Sizewell A2 | United Kingdom | GCR | Magnox | 210 | 1966 |
Countries by operating capacity in 2006
| # | Country | Reactors | MWe | Under construction |
|---|---|---|---|---|
| 1 |  United States | 104 | 103,782 | 1 |
| 2 |  France | 59 | 63,260 | — |
| 3 |  Japan | 56 | 47,635 | 2 |
| 4 |  Russia | 33 | 21,782 | 3 |
| 5 |  Germany | 17 | 20,496 | — |
| 6 |  South Korea | 20 | 17,293 | 1 |
| 7 |  Canada | 22 | 15,409 | — |
| 8 |  Ukraine | 15 | 13,107 | 2 |
| 9 | United Kingdom | 19 | 10,337 | — |
| 10 |  Sweden | 10 | 9,856 | — |
| 11 | Spain | 8 | 7,569 | — |
| 12 | China | 9 | 6,798 | 5 |
| 13 |  Belgium | 7 | 5,922 | — |
| 14 |  Taiwan | 6 | 5,052 | — |
| 15 |  Czech Republic | 6 | 3,972 | — |
| 16 | India | 15 | 3,485 | 7 |
| 17 |  Switzerland | 5 | 3,346 | — |
| 18 |  Finland | 4 | 2,794 | 1 |
| 19 | Slovakia | 5 | 2,276 | 2 |
| 20 | Bulgaria | 2 | 2,006 | — |
| 21 |  Hungary | 4 | 1,916 | — |
| 22 |  Brazil | 2 | 1,884 | — |
| 23 |  South Africa | 2 | 1,854 | — |
| 24 |  Mexico | 2 | 1,552 | — |
| 25 |  Lithuania | 1 | 1,185 | — |
| 26 |  Argentina | 2 | 943 | 1 |
| 27 |  Slovenia | 1 | 696 | — |
| 28 |  Romania | 1 | 650 | 1 |
| 29 |  Netherlands | 1 | 482 | — |
| 30 |  Armenia | 1 | 416 | — |
| 31 |  Pakistan | 2 | 390 | 1 |
| 32 |  North Korea | 1 | 5 | — |
| 33 |  Iran | 0 | 0 | 1 |
| 34 |  Philippines | 0 | 0 | — |
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.