nuclear reactor
A nuclear reactor is a device used to initiate and control a Nuclear fission, fission nuclear chain reaction. They are used for Nuclear power, commercial electricity, nuclear marine propulsion, marine propulsion, Weapons-grade plutonium, weapons ...
s in the world, sorted by country, with operational status. The list only includes civilian
nuclear power
Nuclear power is the use of nuclear reactions to produce electricity. Nuclear power can be obtained from nuclear fission, nuclear decay and nuclear fusion reactions. Presently, the vast majority of electricity from nuclear power is produced by ...
reactors used to generate electricity for a
power grid
''Power Grid'' is the English-language version of the second edition of the multiplayer German-style board game ''Funkenschlag'', designed by Friedemann Friese and first released in 2004. ''Power Grid'' was released by Rio Grande Games.
I ...
. All commercial nuclear reactors use
nuclear fission
Nuclear fission is a reaction in which the nucleus of an atom splits into two or more smaller nuclei. The fission process often produces gamma photons, and releases a very large amount of energy even by the energetic standards of radioactiv ...
. As of May 2025, there are 439 operable power reactors in the world, with a combined electrical capacity of 397.7 GW. Additionally, there are 68 reactors under construction and 108 reactors planned, with a combined capacity of 74 GW and 103 GW, respectively, while 359 more reactors are proposed. For non-power reactors, see
List of nuclear research reactors
This is an annotated list of all the nuclear fission-based nuclear research reactors in the world, sorted by country, with operational status. Some "research" reactors were built for the purpose of producing material for nuclear weapons.
Alger ...
. For fuel plants see List of nuclear reprocessing plants. Where not otherwise specified, all information is sourced from the Power Reactor Information System (PRIS) of the
International Atomic Energy Agency
The International Atomic Energy Agency (IAEA) is an intergovernmental organization that seeks to promote the peaceful use of nuclear technology, nuclear energy and to inhibit its use for any military purpose, including nuclear weapons. It was ...
(IAEA).
In the following tables, the ''capacity'' (expressed in
megawatt
The watt (symbol: W) is the unit of Power (physics), power or radiant flux in the International System of Units (SI), equal to 1 joule per second or 1 kg⋅m2⋅s−3. It is used to quantification (science), quantify the rate of Work ...
, MW) refers to the ''net capacity'', or the maximum electricity output under reference ambient conditions, after deducting the losses within the system including the energy transformers."Reference Unit Power" at IAEA
Argentina
Armenia
Austria
Bangladesh
Belarus
Belgium
Brazil
Bulgaria
Canada
China
Cuba
Czech Republic
Egypt
Finland
France
Germany
Hungary
India
Iran
Italy
Japan
Kazakhstan
Lithuania
Mexico
Netherlands
North Korea
Pakistan
Philippines
Poland
Romania
Russia
Slovakia
Slovenia
South Africa
South Korea
Spain
Sweden
Switzerland
Taiwan
Turkey
Ukraine
United Arab Emirates
United Kingdom
United States
Uzbekistan
See also
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Economics of nuclear power plants
Nuclear power construction costs have varied significantly across the world and over time. Large and rapid increases in costs occurred during the 1970s, especially in the United States. Recent cost trends in countries such as Japan and Korea ha ...
List of nuclear power stations
The following page lists operating nuclear power stations. The list is based on figures from PRIS (Power Reactor Information System) maintained by International Atomic Energy Agency.List of boiling water reactors
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List of largest power stations
This article lists the largest power stations in the world, the ten overall and the five of each type, in terms of installed electrical capacity. Non-renewable power stations are those that run on coal, fuel oils, nuclear fuel, natural gas, oi ...
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List of small modular reactor designs
Small modular reactors (SMR) are much smaller than the current nuclear reactors (300MWe or less) and have compact and scalable designs which propose to offer safety, construction, and economic benefits, and offering potential for lower initial cap ...
Lists of nuclear disasters and radioactive incidents
These are lists of nuclear disasters and radioactive incidents.
Main lists
* List of nuclear and radiation accidents and incidents
* List of nuclear and radiation accidents by death toll
* List of civilian nuclear accidents
* List o ...
*
Nuclear power by country
Nuclear power plants operate in 31 countries and generate about a tenth of the world's electricity.
Most are in Europe, North America and East Asia.
The Nuclear power in the United States, United States is the largest producer of nuclear pow ...
World Nuclear Association
World Nuclear Association is the international organization that promotes nuclear power and supports the companies that comprise the global nuclear industry. Its members come from all parts of the nuclear fuel cycle, including uranium mining ...