Total megawatts of U.S. nuclear capacity offline right now (units in outages plus reduced power).
1,166
MW Offline
Percentage of total fleet capacity currently online and generating power.
98.8%
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).
1
Units Offline
Units operating between 1-99% power (excluding known startups or coastdowns).
4
Reduced Power
Units nearing the end of their fuel cycle, gradually lowering power before an outage.
1
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.
10
Breaker-to-Breaker
Nuclear NewsNEW Thorium Atomics advances Tesseract licensingThorium Atomics has initiated pre-application engagement with the Nuclear Regulatory Commission for its 100 MWe Tesseract TGR reactor under the 10 CFR Part 53 framework. The helium-cooled, pebble-bed design utilizes TRISO fuel and a thorium breeding blanket to provide industrial process heat. The company is also seeking access to the Idaho National Laboratory Nuclear Energy Launch Pad to conduct independent physics validation of its core design. Thorium Atomics has begun pre-application NRC engagement for its Tesseract TGR advanced reactor under the new Part 53 licensing framework. The 100 MWe helium-cooled, pebble-bed reactor is designed to deliver 750°C industrial process heat and firm electricity, while using sub-10% enriched TRISO fuel and a thorium breeding blanket. Toronto-based Thor...
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Core ContentNuclear NewsNEW Diversification and the common groundThe Department of Energy is providing $17.5 billion in financing to support long-lead procurement for AP1000 reactor components. This initiative aims to reduce investment risks for manufacturers of pressure vessels and steam generators. Meanwhile, reactor developers are increasingly integrating modular construction and digital manufacturing techniques from the aerospace and wind energy sectors to accelerate project timelines and expand the industry supply chain. Who would have thought, just a few years ago, that we would see so many long-standing barriers to new nuclear development falling like dominoes? Public opinion, policy, regulatory reform, finance and investment, design maturity, nuclear fuel enrichment, and fuel fabrication capacity have all advanced with remarkable speed in the United States. Conventional wisdom holds that the most effective way to scale up the nuclear supply chain is to do so strategically, matching investments to the needs of reactor developers. A perfect example is the recent $17.5 billion award from the Department of Energy’s Office of Energy Dominance F...Core Content
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Nuclear NewsNEW Calif. officials urge Diablo Canyon extension, but Newsom holding offA group of 54 California elected officials sent a letter urging state leadership to extend the operation of the two-unit, 2,240 MWe Diablo Canyon plant beyond its current 2030 closure date. Governor Gavin Newsom indicated he will not pursue further legislative action during his remaining term, leaving the decision to his successor. The plant currently holds NRC operating licenses extending through 2065. Dozens of elected officials in California are urging Gov. Gavin Newsom and the California Legislature to act this year to extend operations at Diablo Canyon nuclear power plant past 2030. Wheth...Core Content
Core ContentNuclear NewsNEW NRC shares more on reactor licensing proposed rule at virtual Q&AThe Nuclear Regulatory Commission held three virtual meetings to discuss a 550-page proposed rule aimed at modernizing reactor licensing, safety oversight, and siting. The proposal includes provisions for extended license durations and risk-informed, performance-based pathways for new and existing reactors. Public comments on the rulemaking are being accepted through August 31, with a final rule expected in December. The Nuclear Regulatory Commission’s proposed rule on modernizing reactor licensing, safety oversight, and siting practices ran over 550 pages when it was unveiled in July. To address the massive rulemaking, the NRC held three meetings last week to address all the topics. At the third and final meeting, NRC staff addressed license and permit durations, 10 CFR Parts 52 and 54 enhancements, changes to emergency preparedness, and decommissioning financial assurances for new reactor applicants. The NRC responds: Among the more notable proposals found in the rulemaking was the potential to change or extend the duration of early site permits, manufacturing licenses, and operati...Core Content
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Nuclear NewsNEW Re-examining Plymouth’s fraught relationship with nuclear energyThe Pilgrim nuclear power plant in Plymouth, Massachusetts, is the subject of a retrospective examination regarding its economic and operational history. The facility, which operated from 1972 until its closure in 2019, provided significant tax revenue to the town while facing persistent mechanical issues, regulatory scrutiny, and public opposition throughout its lifespan. The history of the 685 MWe plant highlights the complex relationship between host communities and nuclear utilities. As the site undergoes decommissioning by Holtec International, the local debate has shifted toward the long...Core Content
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Nuclear NewsNEW TVA preserving Bellefonte plant for future use as nuclear development negotiations quicken paceThe Tennessee Valley Authority is negotiating to potentially utilize the unfinished Bellefonte site for the deployment of multiple GE Vernova Hitachi BWRX-300 small modular reactors. Construction at the facility originally began in 1975 but was suspended in 1988 due to shifting regional electricity demand. No final decision has been reached regarding the site's future generation capacity. Jackson County's unfinished Bellefonte Nuclear Plant could be utilized for future nuclear development, depending on the outcome of ongoing negotiations… Should an agreement be reached, the TVA-owned site will...Core Content
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Nuclear NewsNEW Tennessee and Deliver UNITY-3 with ORNL, a First-of-Its-Kind Facility to De-Risk Fusion TechnologyKyoto Fusioneering is relocating its U.S. headquarters to Tennessee to partner with Oak Ridge National Laboratory on the construction of the UNITY-3 facility. This project aims to provide shared infrastructure for validating tritium breeding blanket technology, a component required for future commercial fusion power plants to produce their own fuel. The facility addresses a technical gap in the fusion industry by allowing developers to test blanket systems in a controlled nuclear environment. By centralizing this testing capability, the project seeks to reduce the financial and technical burde...Core Content
Core ContentNuclear NewsNEW Laboratory Extend Advanced Nuclear Fuel Research PartnershipTRISO-X and Oak Ridge National Laboratory have extended their cooperative research agreement to continue developing commercial-scale TRISO fuel manufacturing. The partnership allows the company to maintain its pilot fabrication facility at the laboratory site. This collaboration focuses on optimizing fuel quality, production yields, and refining chemical engineering processes for advanced fuel. This extension supports the transition of TRISO fuel from experimental research to industrial-scale production. By leveraging national laboratory resources, the company aims to stabilize supply chains f...Core Content
Core ContentNuclear NewsNEW NRC holds public meeting for proposed rule eliminating ALARAThe Nuclear Regulatory Commission held a public meeting regarding a proposed rule that would eliminate the as low as reasonably achievable (ALARA) principle. The agency aims to replace this standard with a graded approach while maintaining current linear no-threshold models. Public comments on the proposal are being accepted through August 31. This shift represents a change in how licensees manage radiation protection and effluent reporting. While baseline dose limits for workers remain unchanged, the proposal introduces a caregiver concept to provide flexibility for medical patients. Industry observers are monitoring how these regulatory adjustments will impact site operations, reporting requirements, and the long-standing application of radiation safety standards in the field. The Nuclear Regulatory Commission has proposed a change to how it will approach standards for radiation protections, notably including the elimination of the “as low as reasonably achievable” (ALARA) principle. The proposed change was published in the Federal Register on July 15, and yesterday the agency held...Core Content
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Outage NewsNEW Monticello trips offline, unscheduled outage underwayMonticello entered an unscheduled forced short outage on August 10, 2026, ending a 130-day streak of outage-free operation. This event marks the second forced outage for the 617-MW General Electric BWR/3 unit during the 2026 calendar year. The unit, which has been in commercial operation since 1971, recorded four forced outages throughout 2025. Northern States Power Co - Minnesota operates this facility along with two other U.S. nuclear units. Across the industry today, 94 units are maintaining a 97.9 percent capacity factor, with this unit currently representing the only facility in an unscheduled outage. MONTICELLO, MN. Monticello dropped offline on Aug 10, 2026 , beginning an unscheduled outage. The NRC has not yet issued an event notification for this trip; a follow-up reply will be po...Core Content
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Outage NewsNEW River Bend 1 trips offline, unscheduled outage underwayRiver Bend 1 began an unscheduled forced short outage on August 1, 2026. This event ended a streak of 256 days of operation without an unscheduled outage at the 968-MW General Electric BWR/6 facility. The unit has recorded one forced outage so far in 2026, compared to four forced outages during the 2025 calendar year. Entergy Louisiana operates this unit and one other nuclear unit in the United States. Across the industry, the current fleet capacity factor is 98.6 percent among 94 units, with one unit currently in an unscheduled outage and zero units in refueling. The facility has been in comm...Core Content
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Outage NewsMillstone 2 trips offline, unscheduled outage underwayMillstone 2 entered a forced short outage on August 4, 2026. This event ended a 51 day unscheduled outage free streak for the 863 MW Combustion Engineering pressurized water reactor. This forced outage marks the second such event for Millstone 2 during 2026, following a year in 2025 with zero forced outages. Dominion Energy Nuclear Conn operates this unit and one other U.S. nuclear unit. Across the industry, 94 units are currently maintaining a 97.7 percent capacity factor. There are two units in unscheduled outages nationwide, with River Bend 1 being the only other unit currently offline. WAT...Core Content
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Site NewsEvery Outage Finally Has a NameEvery Outage Finally Has a Name If you have worked an outage, you know it has a name. Nobody at the tool crib says "the spring outage at Catawba." They say C1R28 . It is on the badge, on the schedule, on the coffee cup somebody had printed.For years, right here on NukeWorker, every one of those outages was a date range and a colored bar. "Catawba 1, March 2026." Technically true. Totally soulless. That bugged me. So we went and got the names. The hunt Here is the thing nobody tells you: there is no master list. Nowhere can you download a tidy file where some kind soul has written down that Turkey Point 3's spring outage was TP3-35 and Surry 2's was EOC33 . What there is: tens of thousands of NRC inspection reports , licensee event reports, and utility letters, scanned and OCR'd and scatter...
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RennhackRadiation SafetyKyle HillGreat post, Marlin! I wasn't aware this change was getting YouTube traction lol. Thanks for the link.
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Radiation SafetyRadiation Protection AIthose that have a chatgpt subscription. Another great tool for RCT's, Rad Engineers or CHP'sS T I G
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