Total megawatts of U.S. nuclear capacity offline right now (units in outages plus reduced power).
13,788
MW Offline
Percentage of total fleet capacity currently online and generating power.
85.8%
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).
13
Units Offline
Units operating between 1-99% power (excluding known startups or coastdowns).
1
Reduced Power
Units nearing the end of their fuel cycle, gradually lowering power before an outage.
2
Coastdown
Units increasing power following an outage or scram.
1
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
Fallen:NEW Roger SlocumRoger passed away recently. He retired from Oconee after 46 years and then came back and worked some more. Roger was a long time Rad tech and ALARA planner. A great many people are very sad right now. He will be missed.
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History & TriviaFewer Than 10 American Veterans Who Saw Hiroshima and Nagasaki Are Still Alive. Their Stories Are DiFewer than 10 American service members who entered Hiroshima and Nagasaki as occupation troops in 1945 remain alive. These aging veterans are the last direct witnesses to the immediate human and structural devastation caused by the first wartime use of atomic weapons. For decades, government secrecy orders prevented these personnel from discussing their radiation exposure and observations. Preserving their firsthand accounts provides valuable historical documentation regarding the long-term health effects of radiation on military personnel and the realities of nuclear warfare. American occupat...
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Nuclear NewsNEW Massachusetts man pleads guilty to selling radioactive material from RussiaJacob D. Miller pleaded guilty to illegally importing and mailing radioactive plutonium through an online element-sales business. Federal prosecutors stated that the Massachusetts man shipped the material to dozens of customers without authorization, violating federal hazardous materials laws. The case highlights ongoing vulnerabilities in the oversight of retail chemical and radioactive sample distribution. Jacob D. Miller, 44, pleaded guilty to illegally importing plutonium and selling it. A Massachusetts man pleaded guilty in a case involving illegally importing and selling radioactive material from Russia, federal prosecutors said Monday. Jacob D. Miller, 44, pleaded guilty to importing nuclear material without lawful authority, as well as being a felon in possession of ammunition, bei...Core Content
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Nuclear NewsNEW EM UpdateCelebrating EM Excellence: Secretary’s Honor Awards; Walsh Advances President Trump’s U.S.-Japan Energy and Nuclear Cleanup Cooperation; and much more! Energy Secretary Chris Wright presented seven Secretary of Energy Honor Awards to Department of Energy Office of Environmental Management employees and teams. Meanwhile, Assistant Secretary Tim Walsh traveled to Japan to advance bilateral nuclear cleanup cooperation and tour the Fukushima Daiichi plant. These recognitions highlight operational milestones in waste vitrification, drone-assisted tank inspections, and the acquisition of high-assay...Core Content
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Nuclear NewsNEW Nano Nuclear seeks to build front-end capabilities with Radnostix assetsNano Nuclear agreed to purchase assets from Radnostix, including an NRC-licensed depleted uranium deconversion facility in Lea County, New Mexico. The pending transaction covers facility infrastructure and intellectual property related to fluorine extraction processes. Execution of the agreement remains subject to approval by federal regulators. The acquisition supports Nano Nuclear's broader strategy to build front-end nuclear fuel cycle capabilities for its microreactor designs. Securing domestic deconversion and fuel manufacturing assets helps developers manage supply chain bottlenecks in t...Core Content
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Nuclear NewsNEW Tritium detector for continuous underground monitoringThe Thomas Jefferson National Accelerator Facility recently signed a formal cooperative research and development agreement with startup Canary Instruments to commercialize a specialized monitoring device. The technology is designed to track radioactive isotopes in groundwater near nuclear fission and fusion facilities. Traditional radioisotope testing relies on periodic manual water sampling, which provides only limited snapshots of environmental conditions. The new device uses unclad scintillating fibers and silicon photomultipliers placed directly in boreholes to capture continuous data. Thi...Core Content
Core ContentNuclear NewsNEW NuCube Energy Advances Integrated Energy Systems Testing at USRELNuCube Energy partnered with the Utah San Rafael Energy Lab and Brigham Young University to test high temperature heat pipe technology. Researchers are utilizing a 250 kilowatt induction furnace to simulate the thermal output of the NuSun microreactor. The setup validates energy conversion and industrial heat applications. The test platform provides a controllable heat source for studying chemical manufacturing, hydrogen production, and power generation using supercritical carbon dioxide. Advanced nuclear developers are increasingly focusing on non electric applications to expand the commercia...Core Content
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Nuclear NewsNEW NVIDIA Head of Sustainability: how to accelerate America’s nuclear energy renaissance Rising electricity demand from artificial intelligence and advanced manufacturing is driving renewed interest in nuclear power across the United States. Technology companies are advocating for faster deployment schedules by integrating artificial intelligence into reactor design, simulation, and regulatory processes. Advanced reactor developers currently face delays related to traditional manufacturing supply chains and lengthy licensing reviews by the Nuclear Regulatory Commission. Streamlining these regulatory timelines and adopting digital simulation tools can help the nuclear sector scale...Core Content
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Nuclear NewsNEW Legislators talk power grid/nuclear option, OG&E talks rate hike proposalLegislators talk power grid/nuclear option, OG&E talks rate hike proposal Oklahoma lawmakers are examining the state power grid and evaluating nuclear energy as a potential generation source to meet rising demand. Increasing electricity needs from data centers and industrial loads prompted legislative discussions on grid capacity, infrastructure costs, and future energy options. At the same time, Oklahoma Gas and Electric is pursuing a rate review to cover recent infrastructure upgrades. While state officials consider nuclear deployment and fuel recycling concepts, local utilities highlight th...Core Content
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Nuclear NewsNEW Missouri wants nuclear power to revamp its energy futureEnergy demand is skyrocketing as coal plants face retirement. Setting this to “off” disables targeted advertising and related trackers in your current browser. To fully opt out, you must disable tracking on each browser and device you use. Clearing cookies may reset your preferences. Because we can't link your Axios subscriber account (email) to browser cookies, you may also want to update your settings in the Privacy Center to ensure your account is fully opted out. See our Privacy Policy for more on how we use personal data and your rights. Review our… Read the full article at axios.co...Core Content
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Nuclear NewsNEW Keeping the balance: How flexible nuclear operation can help add more wind and solar to the grid* News This solar startup revolves around an artificial sun Fourth Power—an MIT startup with MITEI roots—has designed a solar cell that generates its energy through built-in solar panels powered by hot graphite. Founder Asegun Henry (Mechanical Engineering) states that this "could become a preferred method of providing extra power to electrical grids during periods of peak demand." * News Can the Global South align the world’s carbon markets?Brazil is chairing a new international body that… Read the full article at energy.mit.edu :Core Content
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Outage NewsNEW Palo Verde 1 begins Fall 2026 refueling outagePalo Verde Unit 1 began a routine refueling outage on October 3, 2026, starting exactly on its scheduled date. The 1,311-megawatt pressurized water reactor enters the maintenance period following a 1,270-day unscheduled-outage-free streak. Operated by Arizona Public Service, the unit had completed about 93 percent of its typical 548-day operating cycle and recorded an 87.8 percent capacity factor during the 2025 cycle. The 45-day scheduled duration compares against a 42.4-day historical average across 18 prior refuels for the plant. Across the broader U.S. fleet, 94 units operated at an 85.4 percent capacity factor, with 12 units currently in refueling outages. TONOPAH, AZ. Refueling activities began at Palo Verde 1 on Oct 3, 2026 . The unit started on the published date (Oct 3, 2026) with...Core Content
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Outage NewsNEW Salem 1 begins Fall 2026 refueling outageSalem 1 began a routine refueling outage on October 4, 2026, starting precisely on its planned date. The PSEG Nuclear plant has a scheduled duration of 50 days for this maintenance period. The 1,153-MW Westinghouse 4-loop pressurized water reactor entered this refueling outage after maintaining a 624-day unscheduled-outage-free streak. Salem 1 had run about 90 percent of its typical 549-day operating cycle following an 85 percent capacity factor during its 2025 cycle. PSEG Nuclear operates two other United States nuclear units, while the broader nuclear fleet records an 85.2 percent capacity f...Core Content
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Outage NewsNEW McGuire 1 completes Fall refueling outage in 29 daysMcGuire 1 began a routine refueling outage on September 5, 2026, concluding after 29 days on October 3. The fall maintenance window ran one day longer than the planned 28 day schedule. Operated by Duke Energy Carolinas, the 1,158-MW Westinghouse pressurized water reactor maintained an unscheduled-outage-free streak of 246 days before the project. The duration ranked as the 13th-longest among the unit's 19 tracked refuels, falling below the historical average of 37.6 days for its 18 prior refuels. Across the broader U.S. fleet, 94 units operated at an 85.2 percent capacity factor while four oth...Core Content
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