Total megawatts of U.S. nuclear capacity offline right now (units in outages plus reduced power).
10,825
MW Offline
Percentage of total fleet capacity currently online and generating power.
88.8%
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).
10
Units Offline
Units operating between 1-99% power (excluding known startups or coastdowns).
0
Reduced Power
Units nearing the end of their fuel cycle, gradually lowering power before an outage.
4
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 Some Idaho officials say proposed nuclear waste shipments could threaten Eastern Snake Plain AquiferState officials and former nuclear workers warn that a proposed Department of Energy innovation campus could force Idaho to accept tens of thousands of tons of spent nuclear fuel. Critics argue the agreement undermines the 1995 Settlement Agreement designed to prevent the state from becoming a commercial waste repository. The debate highlights ongoing tensions between federal nuclear initiatives and state environmental protections, specifically regarding threats to the Eastern Snake Plain Aquifer. Stakeholders remain divided over whether economic development benefits outweigh long-term environ...
Nuclear NewsNEW NRC grants review of Homestake Mining’s groundwater ACL applicationThe Nuclear Regulatory Commission has agreed to review an amended application from Homestake Mining Company. The company seeks alternative concentration limits and revised groundwater treatment options for its former uranium milling site near Milan, New Mexico. The agency expects to complete its technical evaluation by September 2027. The review follows a previous denial in 2023 that cited insufficient property ownership data and technical details. This long-running remediation project stems from unlined uranium tailings impoundments used between 1958 and 1990. The current application addresse...
Nuclear NewsNEW Oak Ridge radiochemist tweaks techniques to extract radioisotopes for researchResearchers at Oak Ridge National Laboratory have updated chemical separation procedures to extract rare radioisotopes as byproducts of californium-252 production. The revised methods utilize additional chromatography columns and alternative extraction resins to increase the purity and recovery rates of berkelium, einsteinium, and fermium. These process enhancements also reduce radiation exposure for laboratory personnel handling the heavy elements. Researchers at Oak Ridge National Laboratory are developing techniques to improve the purification of highly valued radioisotopes that are byprodu...
Nuclear NewsNEW NRC roundup: Crane EA/FONSI; new Agreement StateThe Nuclear Regulatory Commission finalized an environmental assessment and finding of no significant impact for the Crane nuclear power plant restart project in Pennsylvania. Additionally, federal regulators approved Indiana as the nation's forty-first Agreement State to oversee specific radioactive materials. The final environmental decision allows Constellation to advance the plant return-to-service timeline without completing a full environmental impact statement. Meanwhile, Indiana assumes regulatory authority over roughly two hundred radioactive material licenses spanning medical, academ...
Nuclear NewsNEW Savannah River Site Harnesses AI to Boost Efficiency in Liquid Waste CleanupSavannah River Mission Completion has deployed a new artificial intelligence assistant named AskSAM to streamline administrative and technical operations at the Savannah River Site. The tool automates routine tasks, assists with complex engineering analyses, and reduces labor hours for technical evaluations by up to seventy percent. Facility operators retain full review authority to ensure safety and quality standards remain met. The U.S. Department of Energy’s Office of Environmental Management liquid waste contractor at the Savannah River Site is employing artificial intelligence to drive on...
Nuclear NewsNEW NorthStar Secures Up to $185 Million Growth Financing Led by Hercules Capital to Scale Actinium-225 NorthStar Medical Technologies secured a growth capital facility of up to $185 million led by Hercules Capital to expand its radiopharmaceutical campus in Beloit, Wisconsin. The funding will scale commercial production of no-carrier-added Actinium-225 using electron-accelerator technology, supporting a growing supply chain for targeted cancer therapies and clinical trials. BELOIT, Wis., September 29, 2026--NorthStar Medical Technologies, LLC (NorthStar), the first commercial-scale producer of no-carrier-added actinium-225 (n.c.a. Ac-225) using electron-accelerator technology, today announced a...
Nuclear NewsNEW A startup wants to build a massive nuclear-powered data center on public land in UtahStartup firm Valar Atomics has submitted an application to the Bureau of Land Management for more than 9,000 acres of public land in Utah. The company proposes constructing 456 small nuclear reactors alongside data centers, fuel production facilities, and waste storage areas. The proposed installation would generate 9.6 gigawatts of power, exceeding the average electricity production for the entire state of Utah. This initiative tests new federal regulatory pathways designed to accelerate the deployment of mass-produced microreactors. Environmental organizations have raised concerns regarding...
Nuclear NewsNEW USC, Westinghouse sign agreement for nuclear workforce training centerThe University of South Carolina signed an agreement with Westinghouse to establish a nuclear workforce training center within its engineering school. The memorandum was finalized at the South Carolina Nuclear Summit in Columbia. The facility will train technicians, engineers, and plant operators. The partnership arrives as developers plan new reactor projects across the United States, creating heavy demand for specialized labor. University officials intend to seek substantial state and private funding for simulators and hands-on construction laboratories. Industry observers note that expandin...
Outage NewsNEW Susquehanna 1 trips offline, unscheduled outage underwaySusquehanna 1 began a forced short unscheduled outage on September 29, 2026. The event ended the 1,247-MW General Electric BWR/4 unit's unscheduled outage-free streak at 317 days. Operator TalenEnergy Susquehanna, which operates one other U.S. nuclear unit, logged one forced outage so far in 2026 compared to two in all of 2025. The plant has been in commercial operation since 1983. Across the broader fleet today, 94 units operate at an 88.9 capacity factor, with nine reactors in refueling and one in unscheduled outages. BERWICK, PA. Susquehanna 1 dropped offline on Sep 29, 2026 , beginning an unscheduled outage. 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 the first unscheduled outage of 2026 for the unit, wh...
Outage NewsNEW Cooper begins Fall 2026 refueling outageCooper began a routine refueling outage on September 28, 2026, starting two days later than its scheduled September 26 start date. The 772-megawatt General Electric boiling water reactor entered the refueling window after running about 100 percent of its typical 647-day operating cycle. Operated by Nebraska Public Power District with commercial operation since 1974, the plant maintained a 1379-day unscheduled-outage-free streak going into the event. The unit posted a 99.4 percent capacity factor during its prior cycle in 2025. Across the United States fleet, 94 units operated at a 90.1 percent...
Outage NewsNEW Byron 2 begins Fall 2026 refueling outageByron Unit 2 began a scheduled refueling outage on September 28, 2026, starting precisely on its planned date. The 1,136-MW Westinghouse four-loop pressurized water reactor entered the fall maintenance period following a 3637-day unscheduled-outage-free streak. Operated by Constellation Nuclear, the unit had run about 94 percent of its typical 547-day operating cycle and posted a 93.9 percent capacity factor during the 2025 prior cycle. Across the broader U.S. fleet, 94 units operated at a 90.1 percent capacity factor with nine units in refueling. BYRON, IL. Byron 2 entered a refueling outage...
Outage NewsNEW Callaway begins Fall 2026 refueling outageCallaway began a scheduled refueling outage on September 26, 2026, starting on its planned date for the fall season. The 1,190-MW Westinghouse four-loop pressurized water reactor entered the maintenance window with a scheduled duration of 45 days. Operated by Union Electric Company in Missouri, the unit entered this refuel following a 301-day unscheduled-outage-free streak. The plant had run about 82 percent of its typical 548-day operating cycle after recording a 66.8 percent capacity factor in 2025. Nationwide, the fleet operated at a 90.1 percent capacity factor across 94 units, with nine u...
History & TriviaNEW Fewer 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 occupation troops witnessed Hiroshima and Nagasaki weeks after the atomic bombs. Fewer than 10 are believed to remain alive. Less than 10 American veterans who saw the Japanese cities after 1945 bombings are...
GeneralNEW Best Company you have worked for(priviate or govt)RP- what company(s) 1 do what they say(2)pay and per diem paid without hassle (3) have the best pay rates?W/ DZ / RSCS
History & TriviaThis Hidden City In Tennessee Held One Of The World’s Most Closely-Guarded SecretsOak Ridge, Tennessee transformed rapidly from a rural farming town into a massive, classified site for the Manhattan Project during World War II. Thousands of workers labored in secrecy to produce material for the atomic weapons that ultimately brought an end to the global conflict. The historic site established strict security protocols and massive industrial infrastructure that laid the groundwork for modern nuclear research facilities. Today, the location preserves its wartime heritage while continuing to contribute to advancements in science, technology, and energy research within the nucl...









Every Outage Finally Has a NameIf you have worked an outage, you know it has a name. Nobody at the tool crib says &qu...
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...
The Fall 2026 U.S. nuclear refueling outage schedule has been released. 25 units are scheduled to refuel this season.
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 ...