?Total megawatts of U.S. nuclear capacity offline right now (units in outages plus reduced power).
206
MW Off
?Percentage of total fleet capacity currently online and generating power.
99.8%
Grid
?Outages scheduled for this season.
25
Fall 2026 Outages
?Units currently at 0% power (likely in an outage or shutdown).
0
Offline
?Units operating between 1-99% power (excluding known startups or coastdowns).
3
Reduce
?Units nearing the end of their fuel cycle, gradually lowering power before an outage.
0
Coasting
?Units increasing power following an outage or scram.
0
Startup
?Units on a qualifying Breaker-to-Breaker run: continuous operation exceeding their cycle-adjusted threshold with no trips to 0% power.
6
B2B
Nuclear NewsNEW BREAKING: Energy Department to Distribute Third Round of HALEU to NASA and RadiaThe Department of Energy has committed to supply high-assay low-enriched uranium to NASA and Radiant Industries for near-term fuel requirements. This allocation supports the SR-1 Freedom mission to Mars and the deployment of a microreactor at Buckley Space Force Base. Because domestic commercial production is currently unavailable, these federal transfers provide the necessary material for advanced reactor designs and space exploration projects. WASHINGTON — The U.S. Department of Energy (DOE) today made conditional commitments to provide high-assay low-enriched uranium (HALEU) to the National Aeronautics and Space Administration (NASA) and Radiant Industries, Inc. to meet near-term fuel needs. The third round of HALEU allocations will support the SR-1 Freedom mission to Mars and Radiant’s...
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Nuclear NewsNEW DOE’s Office of Environmental Management Seeks Industry Input for Heavy Water InThe Department of Energy is soliciting industry feedback on the potential reuse of 530,000 gallons of heavy water stored at the Savannah River Site. This inventory, formerly used as a reactor moderator, is being evaluated for applications in medical isotope production and advanced nuclear research. Interested parties must submit their responses to the request for information by September 21, 2026. WASHINGTON — The U.S. Department of Energy’s (DOE) Office of Environmental Management (EM) is seeking industry input on the beneficial reuse of up to 530,000 gallons of heavy water currently stored a...Core Content
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Nuclear NewsNEW NNSA green-lights Calciner Project decommissioning work at Y-12The National Nuclear Security Administration authorized Consolidated Nuclear Security to begin decommissioning the Calciner Project at the Y-12 National Security Complex. This system converts uranium-bearing materials into stable solids to facilitate the closure of the aging Building 9212. The project supports the transition of uranium processing operations to the new Uranium Processing Facility currently under construction. The National Nuclear Security Administration has granted authorization to Consolidated Nuclear Security (CNS) to begin the decontamination and decommissioning work with th...Core Content
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Nuclear NewsNEW Graphene nanoribbon explored as basis for gamma monitoring in fusion machinesUniversity of Arizona researchers demonstrated that graphene nanoribbons exhibit measurable changes in electrical current when exposed to gamma radiation. These sensors could be placed inside the first wall of fusion reactors to provide real-time data on radiation-induced material degradation. This technology aims to improve maintenance scheduling by identifying structural damage before component failure occurs. A tiny ribbon may hold big promise for detecting radiation damage in future tokamaks. Researchers at the University of Arizona have shown that, when exposed to gamma radiation, graphen...Core Content
Core ContentNuclear NewsNEW Texas A&M welcomes uranium conversion researchTexas A&M welcomes uranium conversion research The Texas A&M Engineering Experiment Station and Quantum Leap Energy have entered a research agreement to optimize the production of high-purity uranium hexafluoride. The collaboration aims to collect physicochemical data to improve conversion efficiency and scalability for domestic fuel supply chains. This project seeks to reduce reliance on foreign sources by advancing technologies for the conversion of yellowcake uranium concentrate. The Texas A&M Engineering Experiment Station (TEES) has signed a research agreement with Quantum Leap Energy (QLE) “to advance and de-risk the commercial production of high-purity uranium hexafluoride (UF6).” QLE is an Austin, Texas–based subsidiary of ASP Isotopes (ASPI), which is developing an isotope enrichment platform for applications in nuclear energy, nuclear medicine, and semiconductors. QLE specializes in the uranium conversion step of the nuclear fuel cycle—the conversion of yellowcake uranium concentrate (U3O8) into UF6 prior to enrichment. Expanding capabilities: As explained by QLE CEO Ryno P...Core Content
Core ContentNuclear NewsNEW Standard Nuclear Announces Licensing and Construction Milestones Across ExpandinPage Unavailable Call +1.888.381.9473 for our Web Support team or open a support ticket if you need further assistance. Read the full article at businesswire.com :Core Content
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Nuclear NewsNEW Marine Minerals Administration, Nuclear Regulatory Commission Sign Memorandum ofThe Marine Minerals Administration and the Nuclear Regulatory Commission have established a formal framework to coordinate the development of nuclear energy projects on the Outer Continental Shelf. This agreement clarifies jurisdictional roles and interagency communication protocols to assist developers in navigating regulatory requirements for offshore reactor deployment. The partnership aims to streamline the oversight process for novel energy production technologies in federal waters. Agreement creates a framework to ensure safe and responsible development of potential nuclear energy projec...Core Content
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Nuclear NewsNEW News Release Genesis Mission funds AI innovation to speed up safe, affordable nuGenesis Mission funds AI innovation to speed up safe, affordable nuclear energy The Department of Energy awarded $60 million to the Prometheus project to integrate artificial intelligence into nuclear energy development. This collaborative effort involves four national laboratories and over 20 industry partners, including X-energy and TerraPower. The initiative aims to reduce costs and accelerate deployment timelines for new nuclear power technologies through advanced computational modeling and digital twin infrastructure. Idaho Falls, IDAHO – The U.S. Department of Energy (DOE) has selected t...Core Content
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Nuclear NewsNEW NRC Proposes Modernized Transportation Rules to Support Advanced Nuclear TechnThe Nuclear Regulatory Commission has proposed updates to radioactive material transportation rules to accommodate advanced reactor designs and new fuel types. The rule shifts from prescriptive certification to a risk-informed framework and permits electronic document submissions to streamline regulatory reviews. The agency will accept public comments on these changes for 30 days following publication in the Federal Register. The Nuclear Regulatory Commission today proposed a major update to its regulations governing the transportation of radioactive materials, modernizing decades-old requirem...Core Content
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Fallen:NEW Rod HamptonGreat guy and excellent RP. Worked for Duke Energy with the fleet RP Instrument Calibration during the last 10+ years of his career until his passing. He was doing well and went downhill quick, we all hated to see him go. You could always count on Rod for a job well done. We will all miss him. Rest in peace brother! 
RADSLINGER
RADSLINGERGeneralNEW New Health Physics Calculator Website? Always seemed that Rad Pro Calculator was more than adequate for most of us. It does not answer test questions directly. It does require a basic understanding of RP concepts. those interesting in the Rad Pro Calculator, By Ray McGinnis, for comparison.
Rennhack
RennhackFallen:Tom"Shine"KellyThank you for sharing. I worked with him and his brother back in the late 80's early 90's with ARC.Rennhack
Rennhack
Outage NewsFermi 2 trips offline, unscheduled outage underwayFermi 2 began a forced short unscheduled outage on 2026-07-04, ending a 44-day unscheduled-outage-free streak. This event marks the second forced outage for the unit in 2026, following zero forced outages during 2025. The 1,141-MW General Electric BWR/4 is currently the only unit in the fleet in an unscheduled outage. MONROE, MI. Fermi 2 dropped offline on Jul 4, 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 second unscheduled outage of 2026 for the unit. Across the U.S. fleet of 94 commercial reactors, today's combined capacity factor is 98.4% (1 unit in an unscheduled outage), above the 97.8% baseline for this month over the past five years. While the unit is down,...Core Content
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Outage NewsWatts Bar 2 refuel pulled forward 7 days: now Nov 6The refueling schedule for Watts Bar 2 has been revised to start on 2026-11-06, which is 7 days earlier than the previous start date of 2026-11-13. The scheduled duration for the outage has also been adjusted from 28 days to 29 days. Watts Bar 2 's next refueling outage has been pulled forward by 7 days in the utility's published schedule. The new scheduled start is Nov 6, 2026 , moving from a previous schedule of Nov 13, 2026. Scheduled duration also revised: now 29 days , 1 day longer than the previously scheduled 28. For workers planning to support this outage, the revised window changes th...Core Content
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Outage NewsWaterford 3 refuel pushed back 17 days: now Oct 17The refueling schedule for Waterford 3 has been revised, moving the start date from September 30, 2026, to October 17, 2026. This adjustment represents a 17-day delay for the beginning of the outage. The planned duration for the event has also been modified, decreasing from 40 days to 25 days. Waterford 3 's next refueling outage has been pushed back by 17 days in the utility's published schedule. The new scheduled start is Oct 17, 2026 , moving from a previous schedule of Sep 30, 2026. Scheduled duration also revised: now 25 days , 15 days shorter than the previously scheduled 40. For workers...Core Content
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