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Alert

Due to a lapse in appropriations, the NRC has ceased normal operations. However, excepted and exempted activities necessary to maintain critical health and safety functions—as well as essential progress on designated critical activities, including those specified in Executive Order 14300—will continue, consistent with the OMB-Approved NRC Lapse Plan.

Power Reactors

The NRC regulates commercial nuclear power plants that generate electricity. There are several types of these power reactors. Of these, only the Pressurized Water Reactors (PWRs) and Boiling Water Reactors (BWRs) are in commercial operation in the United States. Select a type from the list below to view a description and diagram of each. 

There are currently 95 licensed to operate nuclear power plants in the United States (64 PWRs and 31 BWRs), which generate about 20% of our nation's electrical use. For more information about operating reactors, see the location map, list of power reactors, and NRC Project Managers.

As part of operational experience monitoring, the agency will periodically encounter certain reactor systems or management areas that could be improved. For additional information on areas related to safety that the agency is working to improve and upgrade, see Reactor Safety Focus Areas.

Page Last Reviewed/Updated Tuesday, September 30, 2025

Page Last Reviewed/Updated Tuesday, September 30, 2025