| Company | Country of origin | Field of operation | Brief description of business |
|---|
| BHP | Australia | Uranium mining | Owner and operator of theOlympic Dam underground copper and uranium mine inSouth Australia. |
| Energy Resources of Australia | Australia | Uranium mining | Energy Resources of Australia, a subsidiary ofRio Tinto, is an Australian uranium mining company and one of the largest uranium producers in the world, providing 11% of the world's uranium production. It operated theRanger Uranium Mine until it ceased operation in January 2021.[1] |
| Heathgate Resources | Australia | Uranium mining | Wholly owned subsidiary of General Atomics. Operators of Beverley in-situ leach (ISL) uranium mine in South Australia. |
| Paladin Energy | Australia | Uranium mining | Paladin Energy is an Australian mining company developing a number of uranium projects in Australia and Africa. |
| Electrabel | Belgium | Electricity generation | Electrabel, a subsidiary ofGDF Suez, owns and operatesDoel andTihange nuclear power plants. Its wholly owned subsidiarySynatom deals with fuel supply and spent fuel management. |
| Eletronuclear | Brazil | Electricity generation | Eletronuclear, a wholly owned subsidiary ofEletrobrás, operatesAngra Nuclear Power Plant. |
| Bulgarian Energy Holding | Bulgaria | Electricity generation | Bulgarian Energy Holding, through its subsidiary of Kozloduy NPP, owns and operatesKozloduy Nuclear Power Plant. |
| Cameco | Canada | Uranium mining, nuclear fuel | Cameco is a Canadian mining company accounting for 19% of world uranium production. Cameco owns and operates mines in Canada and the United States and holds land positions in areas for new uranium discoveries in Canada and Australia. In addition to mining, Cameco is also active in the refining and conversion of uranium, and in fuel manufacturing. |
| Hathor Exploration | Canada | Uranium mining | Hathor Exploration, a subsidiary of Rio Tinto, is a Canadian uranium mining company. Its main assets are the Midwest NorthEast Project and the Roughrider Deposit. |
| Uranium One | Canada | Uranium mining | Uranium One, a subsidiary ofARMZ Uranium Holding, is a Canadian uranium producer with interests in the uranium mines in Kazakhstan, United States, and South Africa. |
| Bruce Power | Canada | Electricity generation | Bruce Power is a partnership amongCameco Corporation,TransCanada Corporation, andBPC Generation Infrastructure Trust operating theBruce Nuclear Generating Station. |
| New Brunswick Power | Canada | Electricity generation | New Brunswick Power operates thePoint Lepreau Nuclear Generating Station. |
| Ontario Power Generation | Canada | Electricity generation | Ontario Power Generation, wholly owned by the Province of Ontario, operates thePickering Nuclear Generating Station andDarlington Nuclear Generating Station. In addition, it also owns the Bruce Nuclear Generating Station leased on a long-term basis to Bruce Power. |
| Denison Mines | Canada | Uranium mining | Denison Mines is a Canadian intermediate uranium producer operating five uranium mines in the United States and two in Canada, with exploration projects in Canada, the United States, Mongolia, and indirectly in Australia. Through its 97% ownership in OmegaCorp Limited, an Australian uranium mining company, Denison is also involved in the exploration of the Kariba Uranium Project in Zambia. 15% of Denison Mines is owned byKorea Electric Power Corporation. |
| China General Nuclear Power Group | China | Electricity generation | China General Nuclear Power Group is the Chinese state-owned nuclear power company which owns theGuangdong Daya Bay Nuclear Power Station andLing Ao Nuclear Power Station and is building theHongyanhe Nuclear Power Plant,Yangjiang Nuclear Power Station andNingde Nuclear Power Station. |
| China National Nuclear Corporation | China | Holding | China National Nuclear Corporation is a Chinese state-owned energy company, composed of over 100 subsidiary companies and institutes. CNNC is for 45% owner ofChina Guangdong Nuclear Power Group. |
| China Nuclear International Uranium Corporation | China | Uranium mining | China Nuclear International Uranium Corporation (SinoU) is the Chinese state-owned company involved in the overseas uranium mining . |
| Škoda Works | Czech Republic | Engineering, procurement and construction, nuclear engineering, nuclear fuel cycle | Škoda Praha, a subsidiary ofUnited Heavy Machinery, is a nuclear engineering company, the main contractor for the technological part of the construction of theTemelín Nuclear Power Station and theMochovce Nuclear Power Plant. |
| ČEZ Group | Czech Republic | Electricity generation | ČEZ Group operates the Temelín Nuclear Power Station andDukovany Nuclear Power Station. |
| Fortum | Finland | Electricity generation | Fortum is an operator of theLoviisa Nuclear Power Plant. It has minority stakes in the Olkiluoto Nuclear Power Plant in Finland and theForsmark Nuclear Power Plant in Sweden. |
| Fennovoima | Finland | Electricity generation | Fennovoima is a developer of the Pyhäjoki nuclear power plant project. It is affiliated withRosatom through RAOS Voima Oy. |
| Teollisuuden Voima | Finland | Electricity generation | Teollisuuden Voima Oyj is an operator of theOlkiluoto Nuclear Power Plant. |
| Eurodif | France | Uranium enrichment | Eurodif, a subsidiary of Areva, is an operator of the uranium enrichment plant at theTricastin Nuclear Power Center. |
| Framatome | France | Uranium mining, nuclear fuel cycle, nuclear engineering, engineering, procurement and construction. | Framatome is a French nuclear energy group with manufacturing facilities in 58 countries. It covers all industrial activities of nuclear energy. |
| Franco-Belge de Fabrication du Combustible | France / Belgium | Nuclear fuel | Franco-Belge de Fabrication du Combustible, a subsidiary of Areva, is a nuclear fuel producing company located inRomans-sur-Isère in France andDessel in Belgium. |
| Bouygues Construction | France | Engineering, procurement and construction | Bouygues Construction, a part of the French family-owned Bouygues group, mainly builds ports, roads, bridges, tunnels, dams and other public constructions, but has also been involved in building, maintaining and dismantling nuclear power plants. |
| EDF | France | Electricity generation | The EDF Group is a power generation company which operates 58 reactors in 19 different sites. In addition, it has a 45% stake in EnBW, and has a 30% stake in theTaishan Nuclear Power Plant. Its subsidiary EDF Energy Nuclear Generation Limited owns and operates eight plants in the United Kingdom. |
| PreussenElektra GmbH | Germany | Electricity generation | PreussenElektra GmbH is a subsidiary ofE.ON that operates theBrokdorf,Grohnde, andIsar 2 nuclear power plants, and is decommissioning Isar 1 andUnterweser nuclear power plants. |
| EnBW | Germany | Electricity generation | EnBW, a subsidiary ofEDF, through its subsidiary EnBW Kernkraft GmbH operates thePhilippsburg Nuclear Power Plant,Obrigheim Nuclear Power Plant, andNeckarwestheim Nuclear Power Plant. |
| Nukem Energy | Germany | Nuclear fuel cycle | Nukem Energy GmbH, a subsidiary ofCameco, together with its subsidiary Nukem, markets nuclear (reprocessed) fuel components and speciality products. |
| Nukem Technologies | Germany | Nuclear waste management; engineering, procurement and construction | Nukem Technologies GmbH, a subsidiary ofAtomstroyexport, is a nuclear engineering and consulting company managing radioactive waste and spent fuel, and decommissioning of nuclear facilities. |
| GNS Gesellschaft für Nuklear-Service | Germany | Nuclear waste management; engineering, procurement and construction | GNS Gesellschaft für Nuklear-Service mbH carries out services in the field of radioactive waste disposal and decommissioning of nuclear facilities. Its subsidiaryDeutsche Gesellschaft zum Bau und Betrieb von Endlagern für Abfallstoffe is building and operating nuclear waste repositories. |
| Rheinmetall Defence | Germany | Simulation | Offers nuclear power plant operation simulation and training.[2] |
| RWE | Germany | Electricity generation | RWE AG operates theBiblis Nuclear Power Plant,Lingen Nuclear Power Plant andGundremmingen Nuclear Power Plant. |
| Siemens | Germany | Nuclear engineering, engineering, procurement and construction | Siemens Energy develops and builds power plants and power-generating components. It refurbishes and upgrades turbine-generator units, including those used in the nuclear power plants. |
| Bhavini | India | Nuclear development | Bhavini is a public sector enterprise responsible for the construction, commissioning and operation of all Stage IIfast breeder reactors. |
| Nuclear Power Corporation of India | India | Electricity generation | Nuclear Power Corporation of India Limited is a public sector enterprise generating about 3% of the total electricity production in India. It operatesTarapur Atomic Power Station,Rajasthan Atomic Power Station,Madras Atomic Power Station,Narora Atomic Power Station,Kakrapar Atomic Power Station,Kaiga Atomic Power Station, andKudankulam Nuclear Power Plant. |
| Uranium Corporation of India | India | Uranium mining | Uranium Corporation of India is a public sector enterprise involved in the mining and processing of uranium. |
| Nuclear Fuel Complex | India | Nuclear fuel | Uranium Corporation of India is a public sector enterprise involved in nuclear fuel production. |
| Heavy Water Board | India | Heavy water production | Uranium Corporation of India is a public sector enterprise involved in the production of heavy water. |
| National Thermal Power Corporation | India | Electricity generation | The National Thermal Power Corporation has established a joint venture with the Nuclear Power Corporation of India for the construction of nuclear power plants. |
| National Thermal Power Corporation | India | Electricity generation | The National Thermal Power Corporation has established a joint venture with the Nuclear Power Corporation of India for the construction of nuclear power plants. |
| Larsen & Toubro (L&T) | India | Manufacturing of equipment of nuclear power plants | L&T is one of largest engineering companies of India, engaged in building parts of nuclear plants.[3][4][5][6] |
| AzarAb Industries | Iran | Engineering, procurement and construction | AzarAb Industries constructs nuclear power plants and manufactures nuclear power plant equipment. |
| Ansaldo Nucleare | Italy | Nuclear engineering | Ansaldo Nucleare, a subsidiary ofAnsaldo Energia, a part of theFinmeccanica-Group, and works on engineering, construction, operations assistance, waste management and decommissioning projects at nuclear plants worldwide. |
| Enel | Italy | Electricity generation | Enel has nuclear activities in Russia (no operating projects yet), France (a 12.5% stake in the Unit 3 ofFlamanville Nuclear Power Plant), Slovakia (66% stake inSlovenské elektrárne), Spain (92% stake inEndesa) and Italy (a joint venture with Edf named Sviluppo Nucleare Italia Srl). |
| Electric Power Development Company | Japan | Electricity generation | Electric Power Development Co., Ltd. (J-Power) is constructing theŌma Nuclear Power Plant. |
| Tokyo Electric Power Company | Japan | Electricity generation | Tokyo Electric Power Company, (TEPCO) is the largest nuclear operator in Japan. It operates theFukushima Daiichi Nuclear Power Plant,Fukushima Daini Nuclear Power Plant, andKashiwazaki–Kariwa Nuclear Power Plant. |
| Kansai Electric Power Company | Japan | Electricity generation | Kansai Electric Power Company, supplies electric power to theKansai region, and operates theMihama Nuclear Power Plant,Takahama Nuclear Power Plant, and theŌi Nuclear Power Plant. About 41% of its electricity is generated from nuclear. |
| Japan Nuclear Fuel Limited | Japan | Nuclear fuel cycle | Japan Nuclear Fuel Limited is involved in the production of nuclear fuel, as well as the reprocessing, storage and disposal ofnuclear waste. |
| Kazatomprom | Kazakhstan | Nuclear holding | Kazatomprom is a state-owned nuclear holding company in Kazakhstan. Kazatomprom controls all uranium exploration and mining as well as other nuclear-related activities, including imports and exports of nuclear materials in the country. The company accounts for 10% of the world uranium production. It owns a 10% stake inWestinghouse Electric Company. |
| Korea Hydro & Nuclear Power | Korea | Electricity generation | Korea Hydro & Nuclear Power (KHNP), a subsidiary of theKorea Electric Power Corporation, operates 20 nuclear power units at theKori Nuclear Power Plant,Yeonggwang Nuclear Power Plant,Uljin Nuclear Power Plant, andWolseong Nuclear Power Plant. In December 2009, KHNP started cooperating with Areva on the development of uranium mining in Niger. |
| Korea Nuclear Fuel | Korea | Nuclear fuel | Korea Nuclear Fuel, a subsidiary of theKorea Electric Power Corporation, is a manufacturer of nuclear fuels. |
| KEPCO E&C | Korea | Engineering, procurement and construction | KEPCO E&C, a subsidiary of theKorea Electric Power Corporation, is a nuclear power design, engineering, and constructing company. |
| Rössing | Namibia | Uranium mining | Rössing, a subsidiary ofRio Tinto, is an operator of theRössing uranium mine in Namibia. |
| Essent | Netherlands | Electricity generation | Essent, a subsidiary ofRWE, together with DELTA owns 50% of theBorssele Nuclear Power Station in the Netherlands. |
| Nuclearelectrica | Romania | Electricity generation | The state-owned Societatea Nationala Nuclearelectrica operates theCernavodă Nuclear Power Plant. |
| Atomstroyexport | Russia | Nuclear reactor engineering, engineering, procurement and construction | Atomstroyexport, a subsidiary ofRosatom, is a nuclear technology provider and constructor for overseas projects. |
| Inter RAO | Russia | Electricity generation | Inter RAO UES, minority shares owned by Rosatom, operates theMetsamor Nuclear Power Plant in Armenia and is building theKaliningrad Nuclear Power Plant. |
| United Heavy Machinery | Russia | Nuclear engineering | United Heavy Machinery is a provider of primary circuit equipment for nuclear power plants with pressurized water reactors. Its subsidiaryIzhora Plants produces forgings for nuclear reactors. |
| Atommash | Russia | Nuclear engineering | Atommash is a manufacturer of components for nuclear power plants. |
| FSUE Atomflot | Russia | Nuclear fleet service | FSUE Atomflot maintains the world's only fleet ofnuclear-powered icebreakers. |
| Atomenergoprom | Russia | Nuclear holding | Atomenergoprom, a subsidiary of Rosatom, is a holding company for Russian civil nuclear industry. |
| NuScale Power | United States | Nuclear engineering | NuScale is a manufacturer and systems engineering company for small modular nuclear reactors. |
| Rosenergoatom | Russia | Electricity generation | Rosenergoatom, a subsidiary of Rosatom, is an operator of all Russian civil nuclear power plants. |
| Atomenergomash | Russia | Nuclear engineering | Atomenergomash, a subsidiary of Rosatom, is a manufacturer of nuclear power plants' components. |
| ARMZ Uranium Holding | Russia | Uranium mining | ARMZ Uranium Holding, a subsidiary of Rosatom, is a uranium mining company. |
| Rosatom | Russia | Nuclear holding | Rosatom Nuclear Energy State Corporation is the successor of the Russian ministry of the nuclear complex. It is a state-owned holding company for the all Russian nuclear sector, including nuclear power related companies, nuclear weapons companies, research institutes and nuclear and radiation safety agencies. It also represents Russia in the world in the field of peaceful use of nuclear energy and protection of the nonproliferation regime. |
| Tekhsnabexport | Russia | Nuclear fuel cycle | Tekhsnabexport (Tenex), a subsidiary of Rosatom, is a provider of nuclear fuel cycle products and services. |
| TVEL | Russia | Nuclear fuel cycle | TVEL's activities include development, fabrication and sales (including export sales) of nuclear fuel. TVEL, a subsidiary of Rosatom, consists of 14 enterprises, including mining enterprises, major production entities and supporting infrastructure companies. |
| OKBM Afrikantov | Russia | Nuclear engineering | OKBM Afrikantov, a subsidiary of Rosatom, is a nuclear reactor design and engineering company. |
| OKB Gidropress | Russia | Nuclear engineering | OKB Gidropress, a subsidiary of Rosatom, is a nuclear reactor design and engineering company. |
| Slovenske Elektrarne | Slovakia | Electricity generation | Slovenske Elektrarne, a subsidiary of Enel, is an operator of theBohunice Nuclear Power Plant andMochovce Nuclear Power Plant. |
| GEN Energija | Slovenia | Electricity generation | GEN Energija, a state-owned company, is a co-owner of theKrško Nuclear Power Plant. |
| Eskom | South Africa | Electricity generation | Eskom operates theKoeberg Nuclear Power Station. |
| Endesa | Spain | Electricity generation | Endesa owns Unit 1 ofAscó Nuclear Power Plant and has stakes in Unit 2 ofAscó Nuclear Power Plant (85%),Almaraz Nuclear Power Plant (36%),Santa María de Garoña Nuclear Power Plant (50%),Vandellòs Nuclear Power Plant (72%), andTrillo Nuclear Power Plant (1%). |
| Iberdrola | Spain | Electricity generation,EPC | The Iberdrola Group has a total installed nuclear capacity of 3,344 MW. It has stakes in theSanta María de Garoña Nuclear Power Plant (50%),Trillo Nuclear Power Plant (49%),Almaraz Nuclear Power Plant (52%), Unit 2 ofAscó Nuclear Power Plant (15%),Cofrentes Nuclear Power Plant (100%), andVandellòs Nuclear Power Plant (28%). Its subsidiaryIberdrola Ingeniería y Construcción provides engineering, procurement and construction services in France, Russia, Slovakia, Mexico, Brazil, Sweden, Ukraine and Bulgaria. |
| Sydkraft Nuclear | Sweden | Electricity generation | Sydkraft Nuclear, a subsidiary ofSydkraft which is a part of theUniper Group, has stakes in theForsmark Nuclear Power Plant,Ringhals Nuclear Power Plant, andOskarshamn Nuclear Power Plant in Sweden. |
| OKG AB | Sweden | Electricity generation | OKG, controlled bySydkraft Nuclear and Fortum, is an operator of theOskarshamn Nuclear Power Plant. |
| Vattenfall | Sweden | Electricity generation | Vattenfall has stakes in theRinghals Nuclear Power Plant andForsmark Nuclear Power Plant in Sweden, and theBrokdorf Nuclear Power Plant,Brunsbüttel Nuclear Power Plant, andKrümmel Nuclear Power Plant in Germany. |
| Resun AG | Switzerland | Electricity generation | Resun AG, owned by BKW FMB Energie AG (31.25%) and the Axpo subsidiaries Nordostschweizerische Kraftwerke AG (57.75%) and Centralschweizerische Kraftwerke AG (11%), plans to build replacement plants for theMühleberg Nuclear Power Plant and Beznau Nuclear Power Plant. |
| BKW FMB Energie | Switzerland | Electricity generation | BKW FMB Energy is the owner of the Mühleberg Nuclear Power Plant and has a stake in the Leibstadt Nuclear Power Plant. |
| Alpiq | Switzerland | Electricity generation | Alpiq has interest in theGösgen Nuclear Power Plant (40%) and Leibstadt Nuclear Power Plant (32%). It plans to build theNiederamt Nuclear Power Plant. |
| BHP | UK / Australia | Uranium mining | BHP is the world's largest mining company. It owns theOlympic Dam mine, a multi-mineral ore body, which is the largest uranium deposit. |
| Urenco Group | UK / Germany / Netherlands | Nuclear fuel cycle | Urenco operates in a pivotal area of the nuclear fuel supply chain, including mining, conversion, enrichment and fabrication. It owns and operates enrichment plants in the UK (Capenhurst), Germany (Gronau) and the Netherlands (Almelo). In the US, Urenco owns theNational Enrichment Facility inNew Mexico. Urenco also owns a 50% interest in Enrichment Technology Company Limited, a joint venture with Areva. |
| Horizon Nuclear Power | United Kingdom | Electricity generation | Horizon Nuclear Power is developing new nuclear power stations at theWylfa Nuclear Power Station andOldbury Nuclear Power Station sites. It is owned byHitachi. |
| Magnox Ltd | United Kingdom | Nuclear decommissioning | Magnox Ltd. is responsible for the operation and decommissioning ofMagnox nuclear power stations in the United Kingdom. |
| Sellafield Ltd | United Kingdom | Nuclear decommissioning | Sellafield Ltd. is responsible for the decommissioning of theSellafield nuclear facility in the United Kingdom. |
| Energoatom | Ukraine | Electricity generation | Energoatom is a state-owned operator of all nuclear power plants in Ukraine. |
| EnergySolutions | United States | Low Level nuclear waste disposal | EnergySolutions is the largest nuclear waste company in the United States. |
| Fluke Corporation[7] | United States | Radiation Monitoring Systems | Victoreen specializes in radiation detection equipment. Founded in 1928 by John Austin Victoreen, Victoreen was the only maker of nuclear instruments until 1946. Victoreen's early contract to build instruments was to support the development of the first atomic bomb as part of the Manhattan Project. After the end of WWII, Victoreen was the major supplier of instruments for the first atomic tests in the Marshall Islands in 1946 for the Able, Baker and Charlie tests. Victoreen provided 95% of the instrumentation for the South Pacific atomic bomb tests and became known as the “First Nuclear Company”. Today Victoreen has equipment installed in hundreds of facilities and nuclear power plants across the world. |
| Dominion Resources | United States | Electricity generation | Dominion Resources through its three daughter companies operates theKewaunee Power Station (556 MW, north eastern Wisconsin),Millstone Nuclear Power Plant (2,103 MW, Connecticut),North Anna Nuclear Generating Station (1,806 MW) andSurry Nuclear Power Plant (1,598 MW). |
| Duke Energy | United States | Electricity generation | Duke Energy operates theCatawba Nuclear Station,Oconee Nuclear Station, andMcGuire Nuclear Station. It plans to build theWilliam States Lee III Nuclear Generating Station. |
| GE Hitachi Nuclear Energy | United States/Japan | Nuclear reactor engineering; Engineering, procurement and construction; Nuclear fuel | GE Hitachi Nuclear Energy, a partnership ofGeneral Electric andHitachi (in Japan the partnership is Hitachi-GE Nuclear Energy), is a provider of advanced reactor technology and nuclear services, including manufacturing nuclear fuel and uranium enrichment services. |
| NRG Energy | United States | Electricity generation | NRG Energy is an operator of theSouth Texas Nuclear Generating Station. Together withToshiba it develops additional units at the plant. |
| South Carolina Electric and Gas Company | United States | Electricity generation | South Carolina Electric and Gas Company (SCE&G), a subsidiary ofSCANA Corporation, is an operator of theVirgil C. Summer Nuclear Generating Station |
| Southern Company | United States | Electricity generation | Southern Company through its subsidiariesAlabama Power andGeorgia Power operates theJoseph M. Farley Nuclear Generating Station,Edwin I. Hatch Nuclear Power Plant, and theVogtle Electric Generating Plant. |
| UniStar Nuclear Energy | United States | Electricity generation | UniStar Nuclear Energy, a joint venture of EDF andConstellation, is a developer of new units at theCalvert Cliffs Nuclear Power Plant,Nine Mile Point Nuclear Generating Station,Callaway Nuclear Generating Station, and theBell Bend Nuclear Power Plant. |
| Westinghouse Electric Company | United States | Nuclear fuel cycle, nuclear engineering, engineering, procurement and construction | Westinghouse Electric, offers nuclear fuel, services, technology, plant design and equipment. |
| Constellation | United States | Electricity generation | Constellation Energy Nuclear Group, a joint venture of Constellation and EDF, is an operator of the Calvert Cliffs Nuclear Power Plant,Robert Emmett Ginna Nuclear Power Plant, and Nine Mile Point Nuclear Generating Station. |
| Nuclear Fuel Services | United States | Nuclear fuel | Nuclear Fuel Services is a nuclear fuel manufacturer. |
| Sequoyah Fuels Corporation | United States | Nuclear fuel | Sequoyah Fuels Corporation, a subsidiary ofGeneral Atomics, is a uranium processing company in the United States. |
| United States Enrichment Corporation | United States | Uranium enrichment | United States Enrichment Corporation, is a uranium enrichment company in the United States. |
| United Nuclear Corporation | United States | Nuclear fuel cycle, | United Nuclear Corporation is a former American Nuclear company. |
| US Nuclear Corp | United States | Radiation Detection, Tritium Equipment | US Nuclear Corp. is a radiation detection company specializing in advanced tritium detection monitors through itsOverhoff Technology division and radiation detection devices from its Technical Associates (Optron Scientific Corp) division in the United States. |
| "Navoiyuran" State Company | Uzbekistan | Uranium mining | "Navoiyuran" State Company is a uranium mining company in Uzbekistan. |
