Total megawatts of U.S. nuclear capacity offline right now (units in outages plus reduced power).
18,144
MW Offline
Percentage of total fleet capacity currently online and generating power.
81.3%
Fleet Online
Refueling outages scheduled for this season. Each one is a hiring window.
24
Fall 2026 Outages
Units currently at 0% power (likely in an outage or shutdown).
17
Units Offline
Units operating between 1-99% power (excluding known startups or coastdowns).
5
Reduced Power
Units nearing the end of their fuel cycle, gradually lowering power before an outage.
0
Coastdown
Units increasing power following an outage or scram.
2
Starting Up
Units on a qualifying Breaker-to-Breaker run: continuous operation exceeding their cycle-adjusted threshold with no trips to 0% power.
5
Breaker-to-Breaker
Site NewsNEW Our long-range outage projections just got sharperNukeWorker's Outage Schedule gives you two things: validated dates for the coming season, and our own long-range projections for the seasons beyond, 18 to 24 months out, before the utilities publish their dates.Today we upgraded the engine behind those long-range projections. Measured against the dates utilities have since confirmed, the new engine is 28% better at predicting long-range (18 to 24 month) start dates.See how we score ourselves on the Accuracy Scorecard.
Rennhack
Rennhack
Nuclear NewsNEW Fermi America, Blue Energy make strides in TexasFederal regulators completed a draft environmental impact statement for Fermi America and its plan to construct four AP1000 reactors in Texas. Additionally, Blue Energy submitted the first part of a construction permit application for a separate gas-to-nuclear project at the Port of Victoria. The Fermi America review utilized an accelerated pilot program where the applicant drafted the document under regulatory supervision. Both projects aim to supply massive amounts of electricity to upcoming data center developments in the region, reflecting growing ties between advanced nuclear power and the technology sector. A draft environmental impact statement is now complete for Fermi America’s plan to construct and operate four AP1000 reactors at its Project Matador Advanced Energy and Intelligen...
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Nuclear NewsNEW Bluecore Energy Secures Low-Enriched Uranium Located at the Largest Commercial Nuclear Fuel FacilityBluecore Energy secured low-enriched uranium hexafluoride from WMC, storing the material at a commercial nuclear fuel facility in the United States. The company is advancing its compact, water-cooled floating reactor design alongside ongoing regulatory reviews with federal agencies. This fuel procurement shifts the developer from non-fueled hardware engineering toward physical fuel fabrication and testing pathways. The project involves dual oversight from the Nuclear Regulatory Commission and the Coast Guard, highlighting evolving regulatory frameworks for mobile and marine-based nuclear power...Core Content
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Nuclear NewsNEW ABS and U.S. Department of Energy Sign MOU on Maritime Applications of Advanced Nuclear TechnologyThe American Bureau of Shipping and the U.S. Department of Energy signed an agreement to evaluate advanced nuclear technology for commercial marine use. The partnership covers floating power plants, nuclear propulsion for vessels, and required shipyard infrastructure. This initiative establishes a regulatory and technical framework that will create new operational roles for nuclear industry personnel in the maritime sector. News from ABS (WASHINGTON, D.C.) ABS and the U.S. Department of Energy’s (DOE) Office of Nuclear Energy have signed a memorandum of understanding to advance modern commerci...Core Content
Core Content
Nuclear NewsNEW General Fusion reports electron temperatures exceeding 1 keVGeneral Fusion reached electron temperatures exceeding 1 keV on its Lawson Machine 26 demonstration device. The company used Thomson scattering and extreme ultraviolet diagnostics to confirm the results during peak compression. Researchers conducted the measurements in partnership with the UK Atomic Energy Authority. The threshold validates the company's magnetized target fusion design, which employs low-speed compression via an electromagnetic liner instead of superconducting magnets or high-power lasers. General Fusion plans to upgrade the machine to reach 10 keV as it works toward commercia...Core Content
Core Content
Nuclear NewsNEW The environmental case for thorium is real. The commercial fleet isn’t.Thorium offers distinct environmental and safety advantages over conventional uranium, yet commercial adoption remains blocked by entrenched industry infrastructure and economic hurdles. Past projects like Colorado's Fort St. Vrain reactor utilized thorium, but high operating costs and complex fuel fabrication ultimately halted widespread deployment. The commercial nuclear sector relies heavily on established uranium fuel chains, making the investment required for regulatory approval and specialized handling equipment difficult to justify. While international competitors like China continue to...Core Content
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Outage NewsNEW Peach Bottom 2 begins Fall 2026 refueling outagePeach Bottom 2 began a routine refueling outage on October 12, 2026, matching its published schedule. The 1,265-MW boiling water reactor entered the maintenance period following an unscheduled-outage-free streak of 823 days. Constellation Nuclear operates the plant, which commercialized in 1974, alongside 20 other U.S. nuclear units. The unit completed its prior operating cycle with a 99.7 percent capacity factor after running about 96 percent of its typical 732-day cycle. Across the broader U.S. fleet, 94 units showed an 81.3 percent capacity factor with 15 units currently in refueling. DELTA, PA. Peach Bottom 2 came offline on Oct 12, 2026 for refueling. The unit started on the published date (Oct 12, 2026) with a planned 24-day outage running through Nov 5, 2026. Going into the refuelin...Core Content
Core Content
Outage NewsNEW Millstone 3 begins Fall 2026 refueling outageDominion Energy Nuclear Conn began a routine refueling outage at Millstone 3 on October 12, 2026, starting one day later than its scheduled October 11 start date. The Westinghouse four-loop pressurized water reactor entered this maintenance period following an unscheduled outage-free streak of 351 days. The 1,243-megawatt unit had completed roughly ninety-three percent of its typical 552-day operating cycle before the shutdown. Millstone 3 maintains a 38.5-day historical average across seventeen prior refuels, while the broader U.S. fleet operates at an 81.3 percent capacity factor with fiftee...Core Content
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Outage NewsNEW Diablo Canyon 1 begins Fall 2026 refueling outagePacific Gas & Electric began a routine refueling outage at Diablo Canyon 1 on October 11, 2026. The 1,122-megawatt unit started the project one day earlier than its scheduled October 12 start date, targeting a 35-day duration. Going into this project, the Westinghouse four-loop pressurized water reactor maintained an unscheduled-outage-free streak of 297 days after running about 86 percent of its typical 595-day operating cycle. Its prior 2025 capacity factor reached 88.9 percent, compared to a broader U.S. fleet capacity factor of 81.3 percent across 94 units. Operator Pacific Gas & Electric...Core Content
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Outage NewsNEW Hatch 1 trips offline, unscheduled outage underwayHatch 1 began an unscheduled forced short outage on October 11, 2026. The event ended a 167 day unscheduled outage free streak for the unit, with duration projected at about four days. This event marks the second forced outage for Hatch 1 in 2026, compared to one during all of 2025. Operated by Georgia Power, which manages five other nuclear units, the 876 megawatt General Electric boiling water reactor has operated commercially since 1975. Across the national fleet, operations run at an 81.3 percent capacity factor across 94 units, with 15 in refueling and two in unscheduled outages. BAXLEY,...Core Content
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Outage NewsNEW Point Beach 1 begins Fall 2026 refueling outagePoint Beach 1 began a routine refueling outage on October 10, 2026, starting exactly on its planned date. The 598-MW Westinghouse two-loop pressurized water reactor entered the fall maintenance window after completing about 100 percent of its typical 548-day operating cycle. Operated by NextEra Energy Point Beach, the unit entered this refuel carrying an unscheduled outage-free streak of 1,896 days and a prior cycle capacity factor of 93.9 percent. The plant has a 36.6-day average across 18 prior refuels, while NukeWorker holds a 92 percent duration-projection accuracy on this unit. Across the...Core Content
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Outage NewsNEW Browns Ferry 1 completes Fall refueling outage in 28 daysTennessee Valley Authority completed a scheduled refueling outage at Browns Ferry 1 one day ahead of its twenty-nine-day plan. The fall refueling run lasted twenty-eight days and ended after a one hundred forty-two-day unscheduled-outage-free streak. The one thousand two-hundred fifty-six-megawatt General Electric boiling water reactor achieved a ninety-seven-eight percent capacity factor during the prior cycle. Operator Tennessee Valley Authority manages six other United States nuclear units. Across the broader fleet, ninety-four units operated at an eighty-one-three percent capacity factor w...Core Content
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