If you mean companies that are currently active and have a demonstrated track record of successfully designing, building, and commissioning commercial nuclear power plants, the list is relatively short.
| Company | Country | Primary reactor types | Recent successful projects |
|---|
| Westinghouse Electric Company | United States | AP1000 (PWR) | Vogtle Units 3 & 4 (USA), Haiyang & Sanmen (China) |
| Framatome | France | EPR, fuel, services | Major supplier for EPR fleet, extensive global reactor services |
| EDF | France | EPR developer/operator | Taishan 1 & 2 (China), operator of France's reactor fleet |
| Korea Hydro & Nuclear Power (KHNP) | South Korea | APR1400 | Shin Kori units, Barakah Units 1–4 (UAE) |
| Doosan Enerbility | South Korea | Nuclear components/EPC | Major supplier for APR1400 construction |
| Rosatom | Russia | VVER-1200 | Leningrad II, Novovoronezh II, Akkuyu (under construction), numerous exports |
| China National Nuclear Corporation (CNNC) | China | Hualong One, CNP | Fuqing, Zhangzhou, Pakistan projects |
| China General Nuclear (CGN) | China | Hualong One, CPR1000 | Taishan, Fangchenggang, numerous domestic reactors |
| Mitsubishi Heavy Industries | Japan | Advanced PWR technology | Long history of Japanese reactor construction and major nuclear equipment |
Companies with the strongest recent construction records
These organizations have demonstrated the ability to complete large commercial reactors in the last decade:
- KHNP (South Korea): Widely regarded as having one of the best records for delivering projects close to schedule and budget. The four-reactor Barakah project in the UAE is often cited as a benchmark.
- Rosatom (Russia): The most active international exporter of large reactors by number of overseas projects, although many projects are affected by geopolitical considerations.
- CNNC and CGN (China): China has built more new reactors than any other country in recent years, giving these companies extensive recent experience.
- Westinghouse: Successfully brought the AP1000 design into commercial operation after early project delays. Vogtle Units 3 and 4 represent the first new U.S. reactors completed in decades.
Companies with mixed records
- EDF/Framatome: Highly experienced and technically capable, but recent EPR projects in Finland, France, and the UK have experienced significant cost overruns and delays. Taishan in China was completed more successfully than the European projects.
- Mitsubishi Heavy Industries: Strong engineering capabilities but has not completed many recent new-build projects due to Japan's post-Fukushima slowdown.
Emerging companies
Several companies are developing small modular reactors (SMRs) but have not yet completed commercial deployments comparable to the companies above:
These companies are advancing promising designs, but their commercial reactors are still under development or in early deployment phases.
If your interest is which companies are most capable of building a new nuclear power plant today, the leading group would generally be:
- KHNP
- Rosatom
- CNNC / CGN
- Westinghouse
- EDF / Framatome
Each has successfully delivered commercial nuclear power plants and remains active in the global nuclear industry.
