Total megawatts of U.S. nuclear capacity offline right now (units in outages plus reduced power).
2,323
MW Offline
Percentage of total fleet capacity currently online and generating power.
97.6%
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).
2
Units Offline
Units operating between 1-99% power (excluding known startups or coastdowns).
3
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.
0
Starting Up
Units on a qualifying Breaker-to-Breaker run: continuous operation exceeding their cycle-adjusted threshold with no trips to 0% power.
9
Breaker-to-Breaker
Nuclear NewsNEW THE 80 CLUB: Celebrating America’s Longest-Serving Nuclear ReactorsThe Nuclear Regulatory Commission has granted second license renewals to a select group of commercial reactors, allowing them to operate for up to 80 years. These extensions follow the standard 40-year initial licensing period and a subsequent 20-year renewal. This regulatory trend enables the continued operation of aging infrastructure within the existing fleet of 94 domestic reactors. U.S. nuclear plants are licensed for 40 years. Some have received 20-year extensions not once but twice, extending their lifespans to 80 years. The United States has been a global leader in nuclear power generation for decades. The nation's 94 commercial reactors — more than any other nation on earth — have been generating reliable, affordable energy for American homes and businesses since the late 1960s. A...
Core Content
Core Content
Nuclear NewsNEW EM UpdateEnergy Secretary Announces New American Energy Hub at Paducah Site; Savannah River National Laboratory Awarded AI-powered Cleanup Projects Through DOE’s Genesis Mission; and much more! The Department of Energy announced a 100 billion dollar investment to develop an American Energy Hub at the Paducah Site in Kentucky. The project includes a 1.8-gigawatt artificial intelligence data center powered by 2 gigawatts of natural gas generation and 2.6 gigawatts of battery storage, with completion expected by 2031. This redevelopment utilizes existing infrastructure at the former uranium enrichment sit...Core Content
Core ContentNuclear NewsNEW Reuse of Wartime Lands in Volunteer State Launches Nation’s Next American EnergyReuse of Wartime Lands in Volunteer State Launches Nation’s Next American Energy Hub The Department of Energy is repurposing former Manhattan Project and Cold War sites in Oak Ridge, Tennessee, for private-sector nuclear development. The initiative has transferred over 2,500 acres of federal land to local control, facilitating approximately $10 billion in projected capital investment and the construction of new nuclear fuel and reactor manufacturing facilities. This redevelopment model relies on environmental remediation to convert legacy government sites into industrial parks for the nuclear...Core Content
Core ContentNuclear NewsNEW DOE issues RFI for reuse of SRS heavy waterThe Department of Energy is seeking industry input on the potential reuse of 530,000 gallons of heavy water currently stored at the Savannah River Site. This inventory remains from historical tritium and plutonium production operations that concluded in the 1980s. Interested parties must submit responses regarding processing, facility development, or site leasing by September 21. The Department of Energy’s Office of Environmental Management has issued a request for information for industry input about the best ways to reuse and repurpose as much as 530,000 gallons of heavy water that is currently being stored at the Savannah River Site in South Carolina. The deadline to submit responses to the RFI is September 21. Detailed information about the RFI, including contact information and instructions for submissions, was published in the Federal Register. Responses can be emailed to heavywaterrfi@doe.gov with the subject line “EM Heavy Water RFI Collaboration Response.” Background: SRS’s inventory of heavy water—that is, water in which the hydrogen atoms have been replaced by deuterium, a...Core Content
Core Content
Nuclear NewsNEW NRC issues draft EA/FONSI for Duane Arnold restartThe Nuclear Regulatory Commission released a draft environmental assessment and finding of no significant impact regarding the proposed restart of the 562 MWe Duane Arnold facility. This determination suggests the agency will bypass a lengthier environmental impact statement for the project. Public comments on the assessment are being accepted through September 2, with a final decision expected later this year. Efforts by NextEra Energy to restart the Duane Arnold nuclear power plant as early as 2029 continue to move forward with the Nuclear Regulatory Commission's preliminary environmental as...Core Content
Core Content
Nuclear NewsNEW DISA Technologies Launches DISA Uranium Corporation, a New American Uranium Recovery and Production DISA Technologies has launched DISA Uranium Corporation to focus on domestic uranium production and the remediation of abandoned mine sites. The new entity acquired a portfolio of permitted Utah assets from IsoEnergy and secured 105 million dollars in private financing to advance its operations and develop new processing infrastructure. The company utilizes proprietary high-pressure slurry ablation technology to concentrate uranium from mine waste and conventional ore. By integrating environmental cleanup with resource recovery, the firm aims to address long-standing legacy liabilities while e...Core Content
Core ContentNuclear NewsNEW Amazon abandons plans for data center campus at Calvert CliffsAmazon Web Services has withdrawn its proposal to build a 2.4 million square foot data center campus at the Calvert Cliffs Nuclear Power Plant. The decision follows local primary election results where voters ousted county commissioners who supported the development. The county is now considering a six-month moratorium on such projects. This withdrawal highlights the growing tension between hyperscale data center expansion and local land-use regulations. For the nuclear industry, the outcome demonstrates how public opposition to industrial development can impact efforts to co-locate energy-int...Core Content
Core ContentNuclear NewsNEW Holtec, Entergy and Hyundai E&C Sign MOA to Evaluate Potential SMR-300 Projects in Gulf South RegionHoltec, Entergy and Hyundai E&C Sign MOA to Evaluate Potential SMR-300 Projects in Gulf South Region Holtec International, Entergy, and Hyundai Engineering and Construction have signed a memorandum of agreement to evaluate the potential deployment of SMR-300 small modular reactors. The collaboration focuses on identifying candidate sites and commercial structures within Entergy’s service territory to meet rising demand for carbon-free baseload power from large-load industrial customers. This initiative utilizes a dual-unit configuration designed to provide approximately 680 Mwe of electricity....Core Content
Core Content
Nuclear NewsNEW Gas-cooled 300 MW hybrid reactor for electricity, hydrogen clears early review300 MW nuclear reactor clears early review with no major flaws Nuvora Energy completed a pre-feasibility study and third-party review for a proposed 300 MWth high-temperature gas-cooled reactor integrated with a hydrogen production system. The assessment by DBD International identified no immediate technical or regulatory fatal flaws for the design. The company plans to proceed with pre-concept design and a full feasibility study to further evaluate the project's engineering and licensing requirements. An advanced nuclear project combining a high-temperature gas-cooled reactor with hydrogen pr...Core Content
Core Content
_78501.jpg)
Outage NewsNEW Millstone 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. WATERFORD, CT. Millstone 2 entered an unscheduled outage on Aug 4, 2026 . The NRC has not yet issued an event notification for this trip; a follow-up reply will be posted here if one is filed. This is th...Core Content
Core Content
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
Core Content
Outage NewsNEW Turkey Point 4 refueling outage pushed backThe refueling schedule for Turkey Point 4 has been revised with the outage now pushed back to a later start date. The planned duration for this maintenance period has also been extended beyond the previous estimate. Readers should consult the NukeWorker outage schedule for the updated dates and duration details regarding this unit. Turkey Point 4 's next refueling outage has been pushed back in the utility's published schedule. The revised start date and duration are on the NukeWorker outage schedule. The scheduled duration was revised at the same time, and the outage is now planned to run lon...Core Content
Core Content
Site NewsNEW Every 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...
Rennhack
RennhackRadiation SafetyNEW Kyle HillGreat post, Marlin! I wasn't aware this change was getting YouTube traction lol. Thanks for the link.
S T I G
S T I G
Radiation SafetyNEW Radiation Protection AIthose that have a chatgpt subscription. Another great tool for RCT's, Rad Engineers or CHP'sS T I G
S T I G
New on the facility map: see who's hiring at a glanceThe facility map got a pretty good overhau...
Did You Know NukeWorker Has Online Practice Exams? (Now With Certificates)Here is something a lot of folk...
The NukeWorker Reactor Status MapIf you have ever wanted to know which plants are running, which are down for an outa...
We have recently updated the with over 1,500 new aerial and facility images.Some of the late...
POET: plant-specific PRA inputs, built from the operating recordA new tool on NukeWorker turns the U.S. fleet's...
We've launched a new board, Outage News: a running record of refueling and forced outages across ...
New Feature: RadNet Radiation Map Now OnlineWe're excited to announce a major addition to the Facility Info...
We have updated the "Current Reactor Status" section on our facility information pages ...
🔎 Deep Dive: Everything You Can Track on the Facility Info PagesHey everyone, I've been digging thr...
The Nuclear Grid Capacity & Generation Analysis dashboard provides a centralized interface for monitoring and...
We made a new tool fro you:The Operating Reactor Scram Dashboard is a comprehensive analytical tool designed fo...
I am very excited to announce a major upgrade to the NukeWorker Outage Schedules!We now independently project...
NukeWorker's preliminary schedule for Spring 2027 projects 29 nuclear outages, signaling a high-d...
The Fall 2026 nuclear maintenance season features 25 scheduled outages, with peak workload activity proje...
The Spring 2026 nuclear outage season is underway with 34 scheduled maintenance and refueling outages. View the full schedule at .
We've given the entire quiz section a major facelift to make your study sessions smoother and easier on the eyes.
The NukeWorker Photo Gallery has long been the primary destination for our community to share the history, te...
We've just rolled out a major update to the NukeWorker homepage. While the new "Situation Room&quo...
I split the 'Nuclear Discussions' from the 'Nuclear News' posts on the front page.Enhanced the titl...
I've updated the homepage Job Feed with a few key features designed to make it fairer for employers and easier for ...