Detected events

Duraloy Technologies Inc.: AGREEMENT STATE REPORT - STUCK SHUTTER

AGREEMENT STATE REPORT - STUCK SHUTTER The following information was provided by the Pennsylvania Bureau of Radiation Protection (the Department) via email: "On August 10, 2026, [at approximately] 1930 [EDT], a radiographer was working at the licensee's permanent location and could not fully retract the source into the camera. The camera is a QSA Model 880 with a source assembly model QSA Model A424-9. It contai…

Centrus Energy Signs LEU and HALEU Supply Agreement with X-energy

Centrus Energy · News

Heysham 1, Reactor 2: Early end to the 201 MW outage (REMIT message withdrawn)

Elexon BMRS REMIT, message 48X000000000022A-ELXP-RMT-00148062 rev. 7 (Dismissed), published August 10, 2026, at 10:00 UTC. BM Unit T_HEYM12, participant BEGL001. Planned · OPR: "50429: Offload Power Refueling". Window: August 9, 2026, 12:00 UTC → November 8, 2026, 20:00 UTC. Normal capacity: 585 MW; available capacity: 384 MW.

Decommissioning without regulatory notification: Monticello was taken out of service (50% → 0%)

Monticello was taken offline (50% → 0%). No Event Notification was issued by the NRC for the site between 24 hours before and 48 hours after.

Monticello was taken offline (50% → 0%)

Heysham 1, Reactor 2: scheduled power reduction of 201 MW (34% of 585 MW) · refueling

Elexon BMRS REMIT, message 48X000000000022A-ELXP-RMT-00148062 rev. 7 (Dismissed), published August 10, 2026, at 10:00 UTC. BM Unit T_HEYM12, participant BEGL001. Planned · OPR: "50429: Offload Power Refueling". Window: August 9, 2026, 12:00 UTC → November 8, 2026, 20:00 UTC. Normal capacity: 585 MW; available capacity: 384 MW.

River Bend Station 1 returned to service (0% → 2%)

Susquehanna 2 increased its power output from 79% to 100%

M4.6 Earthquake 78 km from Tokai

M 4.6 - 1 km WSW of Inzai, Japan. Depth 77 km. Nearest power plant: Tokai (Japan).

M5.5 Earthquake 137 km from Higashidori (Tohoku)

M 5.5 - 47 km ENE of Noda, Japan. Depth: 34 km. Nearest power plant: Higashidori (Tohoku) (Japan).

Civaux 2: Scheduled Shutdown

EDF, August 8, 2026: “Scheduled shutdown of Generation Unit No. 2.” Tags: Maintenance, Production, Plant Lifecycle.

Flamanville 1: reconnection to the power grid

EDF, August 8, 2026: “Reconnection of Flamanville Power Plant Unit No. 1.” Tags: Production.

Bugey 3: reconnection to the power grid

EDF, August 8, 2026: “Reconnection of Power Unit No. 3.” Tags: Maintenance, Production.

Harris 1 increased output from 50% to 100%

Hope Creek 1 reduced its output from 100% to 70%

Heysham 1, Reactor 1: Scheduled 610 MW outage canceled or rescheduled (REMIT message withdrawn) · refueling

Elexon BMRS REMIT, message 48X000000000022A-ELXP-RMT-00148109 rev. 6 (Dismissed), published August 7, 2026, at 17:04 UTC. BM Unit T_HEYM11, participant BEGL001. Planned · OPR: “51240: Offload Power Refueling.” Window August 23, 2026, 07:30 UTC → September 11, 2026, 22:00 UTC. Normal capacity 610 MW, available 0 MW.

Fermi U2: FITNESS FOR DUTY

FITNESS FOR DUTY The following information was provided by the licensee via phone and email: "On 08/07/2026 at 0818 EDT, a non-licensed supervisor tested positive for drugs during a random test at Fermi 2. The random test was conducted on 07/30/2026 and confirmed positive on 08/07/2026. The non-licensed supervisor's unescorted access to Fermi 2 has been revoked. "The NRC Resident Inspector has been notified." R…

Belleville 1: Scheduled shutdown

EDF, August 7, 2026: “Update on Power Unit No. 1.” Tags: Production. At midnight on Saturday, August 8, 2026, crews at the Belleville-sur-Loire nuclear power plant shut down Generation Unit No. 1 for a scheduled maintenance outage known as a “partial outage.” This outage will allow for the replacement of one-third of the fuel and the performance of more than 10,000 inspection and maintenance operations on our equipme…

Millstone 2 increased its power output from 47% to 100%

M4.6 Earthquake 109 km from Sendai

M 4.6 - 7 km WSW of Mifune, Japan. Depth: 10 km. Nearest power plant: Sendai (Japan).

Chinon 3: reconnection to the power grid

EDF, 06/08/2026: «Actualité de l'unité de production n°3». Etiquetas: Production. Reconnexion de l'unité de production n°3 au réseau électrique L'unité de production n° 3 a été reconnectée au réseau électrique national le 05 août 2026 à 22h45. Pour rappel, elle s'était automatiquement arrêtée le 15 mai 2026, conformément aux dispositifs de sûreté et de protection du réacteur, à la suite d’un départ de feu survenu au …

Harris 1 reduced output from 100% to 50%

Millstone 2 returned to service (0% → 47%)

M4.9 Earthquake 77 km from Sendai

M 4.9 - 13 km west of Honmachi, Japan. Depth: 10 km. Nearest power plant: Sendai (Japan).

NEK to Reduce Reactor Power Tonight to Ensure Full Compliance with Environmental Limits

NEK Krško · News

US Army: LOST AND FOUND SOURCE

LOST AND FOUND SOURCE The following is a summary of information provided by the licensee via phone: On August 6, 2026, at 1255 EDT, the licensee's radiation safety officer was notified of a found source near Fort Wainwright, Alaska. On August 5, 2026, a member of the public found an M67 sight-unit at a local disposal/transfer site. The total activity for the source is 5.79 Ci of tritium. The source appeared to b…

Phillips 66 Sweeny Refinery: AGREEMENT STATE REPORT - DAMAGED SOURCE HOLDER

AGREEMENT STATE REPORT - DAMAGED SOURCE HOLDER The following information was provided by the Texas Department of State Health Services (the Agency) via phone and email: "On August 6, 2026, the Agency received notification from the licensee regarding a source holder not operating as designed. The licensee reported that the source holder, a Vega model SHLG-3, contains an 8000 millicurie cesium-137 sealed source. On Au…

Sizewell B, Unit 1: Returns to Service After 95 MW Reduction · Intermediate Shutdown

Elexon BMRS REMIT, message 48X000000000022A-ELXP-RMT-00148218 rev. 13 (Active), published August 4, 2026, at 14:20 UTC. BM Unit T_SIZB-1, participant BEGL001. Planned · Interim: "52499: Interim outage". Window: August 3, 2026, 02:30 UTC → August 4, 2026, 17:30 UTC. Normal capacity: 630 MW; available capacity: 535 MW.

M4.6 Earthquake 63 km from Onagawa

M 4.6 – 68 km ESE of Onagawa Chō, Japan. Depth: 46 km. Nearest power plant: Onagawa (Japan).

Community Health Network Inc.: MEDICAL EVENT

MEDICAL EVENT The following information was provided by the licensee via phone: This event occurred at Community Health Network, South Hospital in Indiana on 08/04/2026. On August 04, 2026, at approximately 0830 EDT, while delivering a Y-90 TheraSphere treatment to the liver, air was noted in the delivery lines. Attempts were made to remove the air from the lines to continue with the procedure. The treatment proceed…

NRC: Event 072426

Operation of the Krško Nuclear Power Plant (NEK) During Low Flow and Elevated Temperatures of the Sava River

NEK Krško · News

Penly 1: Automatic reactor shutdown

EDF, 04/08/2026: «Actualité de l’unité de production n°1». Etiquetas: Maintenance, Production. Mardi 4 août 2026 à 08h20, l’activité de maintenance sur un matériel électronique ayant été réalisée, l’unité de production n°1 de la centrale nucléaire de Penly a été reconnectée au réseau électrique national. L'unité de production n°2 est en fonctionnement et connectée au réseau électrique national. Lundi 3 août 2026 à 9h…

Millstone 2 was taken offline (100% → 0%)

M4.5 Earthquake 81 km from Sendai

M 4.5 – 12 km west of Honmachi, Japan. Depth: 10 km. Nearest power plant: Sendai (Japan).

Cleveland Clinic - Martin Memorial Medical Center: AGREEMENT STATE REPORT - MEDICAL EVENT

AGREEMENT STATE REPORT - MEDICAL EVENT The following information was provided by the Florida Bureau of Radiation Control (BRC) via email: "The BRC received a call from the Cleveland Clinic - Martin Memorial Medical Center at 1551 EDT regarding a mis-dosing medical incident. The incident involved one patient who underwent a procedure to receive a dose of Y-90. Surveys conducted upon completion of the procedure showed …

Millstone U2: REACTOR TRIP MANUAL

MANUAL REACTOR TRIP The following information was provided by the licensee via phone and email: "On August 3, 2026, at 1420 EDT, with Millstone Unit 2 operating in Mode 1 at approximately 100 percent power, operators manually tripped the reactor following an 'A' steam generator feedwater pump trip. The reactor trip was uncomplicated, and all plant systems responded as expected. Operations responded and stab…

Intermountain Health St. Mary's Regional Hospital: AGREEMENT STATE REPORT - DOSE TO NURSING CHILD

AGREEMENT STATE REPORT - DOSE TO NURSING CHILD The following information was provided by the Colorado Department of Public Health and Environment via email: "A 33-year-old female patient, with an approximately 6-month-old nursing child, received a diagnostic nuclear medicine study. The patient was administered 300 microcuries of I-123 on the morning of August 3, 2026. The licensee neglected to confirm the patient&#03…

Proximo Distillery: LOST FIXED GAUGES

LOST FIXED GAUGES The following is a summary of information provided by the licensee via phone and email: On August 3, 2026, the licensee discovered 10 missing Industrial Dynamics Co. fixed radiation gauges during inventory. The gauge models lost were: two CI-2GV/3/VDE gauges containing 300 mCi of Am-241 each, two FT-100/2/SFVM-B gauges containing 100 mCi of Am-241 each, one FT-50 containing 100 mCi of Am-241, four C…

Sizewell B, Unit 1: 95 MW power reduction (15% of 630 MW), scheduled · interim shutdown

Elexon BMRS REMIT, message 48X000000000022A-ELXP-RMT-00148218 rev. 13 (Active), published 2026-08-04 14:20 UTC. BM Unit T_SIZB-1, participant BEGL001. Planned · Interim: "52499: Interim outage". Window: August 3, 2026, 02:30 UTC → August 4, 2026, 17:30 UTC. Normal capacity: 630 MW; available capacity: 535 MW.

Heysham 1, Reactor 2: unscheduled power reduction of 223 MW (38% of 585 MW) · operational reasons

Elexon BMRS REMIT, message 48X000000000022A-ELXP-RMT-00148151 rev. 54 (Active), published August 26, 2026, at 15:28 UTC. BM Unit T_HEYM12, participant BEGL001. Unplanned · Operational: "51860: De-load for operational reasons". Window: August 2, 2026, 23:00 UTC → February 28, 2027, 20:00 UTC. Normal capacity 585 MW, available capacity 362 MW.

Bugey 3: Power Reduction

EDF, August 2, 2026: “Adjustment of production at Unit 3 of the Bugey power plant due to...”. Tags: Production.

Chooz: Power Reduction

EDF, August 1, 2026: “Adjustment of production at the Chooz nuclear power plant due to weather conditions...”

River Bend Unit 1 went offline (100% → 0%)

Torness, Reactor 2: Scheduled outage, 640 MW unavailable · Interim outage

Elexon BMRS REMIT, message 48X000000000022A-ELXP-RMT-00148188 rev. 15 (Active), published August 17, 2026, at 16:02 UTC. BM Unit T_TORN-2, participant BEGL001. Planned · Interim: "52331: Interim outage". Window 2026-07-31 08:00 UTC → 2026-08-18 11:30 UTC. Normal capacity 640 MW, available 0 MW.

Neitier Completion Solutions Inc.: AGREEMENT STATE REPORT - DAMAGED GAUGE

AGREEMENT STATE REPORT - DAMAGED GAUGE The following information was provided by the Texas Department of State Health Services (the Department) via phone and email: "On July 30, 2026, the Department was notified by the licensee's radiation safety officer (RSO) that while performing a walk around of the equipment on a wellsite near Dilley, Texas, the technician noticed a Berthold LB8010 gauge with the shutter han…

Sarasota Memorial Hospital: AGREEMENT STATE REPORT - MEDICAL EVENT

AGREEMENT STATE REPORT - MEDICAL EVENT The following is a summary of information provided by the Florida Bureau of Radiation Control (BRC) via email: On July 30, 2026, a 76-year-old patient was undergoing treatment with Y-90 Theraspheres. The prescribed liver dose was 151 Gy, but only 24.1 Gy (15.96 percent) was actually delivered due to a partial kink in the catheter attached to the delivery tube. Both the patient a…

Henry Ford Hospital: MEDICAL EVENT

MEDICAL EVENT The following information was provided by the licensee via phone and email: "A routine yttrium-90 (Y-90) microsphere radioembolization treatment performed in the hospital on July 29, 2026. The radiopharmaceutical used in this treatment, Y-90 microspheres, are manufactured under the brand name Therasphere, which is produced by Boston Scientific (Marlboro, MA, USA). In this procedure, a catheter is guided…

Monticello reduced its power output from 87% to 48%

Robert Wood Johnson Univ. Hospital: AGREEMENT STATE REPORT - MEDICAL EVENT

AGREEMENT STATE REPORT - MEDICAL EVENT The following information was provided by the New Jersey department of environmental protection (NJ DEP) via email: On July 29, 2026, at the Robert Wood Johnson University Hospital in New Brunswick, New Jersey, the licensee was administering a Y-90 SIR-Sphere therapy of 63.45 mCi to a patient. During the procedure, the patient unexpectedly coughed, which caused the treatment cat…

Curium: UNPLANNED CONTAMINATION

UNPLANNED CONTAMINATION The following information was provided by the licensee via phone and email: "On July 28, 2026, at approximately 0751 EDT during the production activities of Sr-82, a pressurized line used for argon burst inside the production hot cell. The burst resulted in the hot cell to be temporarily positively pressurized releasing radioactive material outside of the hot cell. Three operators that were pa…

Evento INES 2 · State of Brandenburg (Alemania): Worker Exceeded Statuary Annual Whole Body Dose Limits

On 27 July 2026, an employee performed a Gamma radiography measurement using a Se-75 source with an activity of 1.48 TBq. After completing the measurement, the employee inadvertently failed to retract the source into its safety position in a shieled container. Subsequently, he carried out activities in the vicinity of the source for up to four minutes at an approximate distance of 50 cm before noticing that the radio…

Gravelines 2: unit shutdown

EDF, July 27, 2026: “Generating Unit No. 2 Disconnected from the Power Grid.” Tags: Production.

Cooper increased its output from 70% to 100%

Civaux 1: Scheduled Shutdown

EDF, July 25, 2026: “Scheduled shutdown of power unit No. 1.” Tags: Plant operations.

Civaux 1: Reconnection to the power grid

EDF, July 25, 2026: “Reconnection of Power Unit No. 1.” Tags: Plant Operations.

Flamanville 3: reconnection to the power grid

EDF, July 25, 2026: “Unit 3 at the Flamanville Nuclear Power Plant Reconnected.” Tags: Production.

Cooper reduced output from 100% to 70%

Loma Linda University: AGREEMENT STATE REPORT - MEDICAL EVENT

AGREEMENT STATE REPORT - MEDICAL EVENT The following information was provided by the California Radiation Control Program (the Program) via email: "The Program was notified on July 28, 2026, that a reportable medial event had occurred on July 24, 2026, at the Loma Linda University Medical Center. The authorized user had prescribed Y-90 Theraspheres, distributed by Boston Scientific Corp. and produced by BWXT Medical …

N/A: AGREEMENT STATE REPORT - FOUND SOURCE

AGREEMENT STATE REPORT - FOUND SOURCE The following information was provided by the Texas Department of State Health Services (the Agency) via phone and email: "On July 25, 2026, the Agency conducted a radioactive source recovery operation and found an orphan source that was buried in the ground in Midland, Texas. The source is a 3M 6576 sealed source containing 100 millicurie (original activity date, April 1967) of …

Framatome makes major progress in advanced reactor fuel manufacturing with latest U.S. Nuclear Regulatory approval

Framatome · Press · Framatome's nuclear fuel manufacturing facility in Richland, Washington, achieved a major licensing milestone with the U.S. Nuclear Regulatory Commission (NRC) approval of a license amendment request (LAR) enabling the site...

Urenco Appoints Company Veterans to Lead Urenco USA Operations and Expansion

Urenco · News

Robert Packer Hospital: The following is a summary of information provided by the PA Bureau of Radiation Protection (the Department) via email:

EN Revision Imported Date: 8/19/2026 EN Revision Text: AGREEMENT STATE REPORT - LOST MEDICAL SEED The following is a summary of information provided by the PA Bureau of Radiation Protection (the Department) via email: On July 24, 2026, the licensee notified the Department of a lost prostate seed. It was discovered that the seed was missing on July 23, 2026. It is reportable under 10 CFR 20.2201 and 10 CFR 35.3045(a)(…

Penly 2: Reconnection to the power grid

EDF, July 22, 2026: “Reconnection of Generation Unit No. 2 at the Penly Nuclear Power Plant.” Tags: Maintenance.

Prairie Island 2 increased its power output from 38% to 99%

United States Steel Corporation: The following information was provided by the Pennsylvania Bureau of Radiation Protection (the Department) via email:

EN Revision Imported Date: 8/10/2026 EN Revision Text: AGREEMENT STATE REPORT - STUCK SHUTTER The following information was provided by the Pennsylvania Bureau of Radiation Protection (the Department) via email: "On July 22, 2026, the licensee notified the Department of a shutter failure that was discovered on July 21, 2026. "On July 21, 2026, the licensee discovered that a fixed gauge shutter was stuck open. The gau…

Desert NDT LLC: AGREEMENT STATE REPORT - LOST SOURCE

AGREEMENT STATE REPORT - LOST SOURCE The following information was provided by the Texas Department of State Health Services (the Department) via phone and email: "On July 24, 2026, the licensee notified the Department of a lost industrial radiography device. The device, a SPEC 150 camera, contains a 16 Ci Ir-192 source. The licensee reported that it was lost by [the common carrier] during shipment from its Midland, …

Bugey 5: reconnection to the power grid

EDF, July 20, 2026: “Generator Unit No. 5 Reconnected After a Brief Outage.” Tags: Maintenance, Production.

Prairie Island 1 increased its power output from 38% to 90%

Susquehanna 1 increased its power output from 75% to 98%

Prairie Island 2 reduced its power output from 72% to 38%

Prairie Island 1 reduced its power output from 100% to 40%

Prairie Island 2 reduced its output from 100% to 72%

Susquehanna 1 reduced its power output from 100% to 75%

Nogent 2: reconnection to the power grid

EDF, July 17, 2026: “Reconnection of Production Unit No. 2 to the national power grid.” Tags: Maintenance, Production, Plant Operations, Safety.

Moffat County School: AGREEMENT STATE REPORT - LOST EXIT SIGNS

AGREEMENT STATE REPORT - LOST EXIT SIGNS The following information was provided by the Colorado Department of Public Health and Environment via email: Eight tritium exit signs were declared lost by the licensee on July 16, 2026. The exit signs are Isolite Corporation model SLXTU1RW10, containing 7.09 Ci of tritium each. Colorado Event Number: CO260017 THIS MATERIAL EVENT CONTAINS A 'Less than Cat 3' LEVEL O…

Regal Southglenn: AGREEMENT STATE REPORT - LOST EXIT SIGN

AGREEMENT STATE REPORT - LOST EXIT SIGN The following is a summary of information provided by the Colorado Department of Public Health and Environment via email: An exit sign was declared lost by the licensee on July 15, 2026. The exit sign is manufactured by Isolite Corporation (Model #: 880-12-6) with a total activity of 11.5 Ci of tritium (H-3). Colorado Event Report ID Number: CO260021 THIS MATERIAL EVENT CONTAIN…

GCF US Holdings, LLC: AGREEMENT STATE REPORT - DAMAGED SHUTTER

AGREEMENT STATE REPORT - DAMAGED SHUTTER The following information was provided by the Georgia Radioactive Material Program (the Program) via email: "At 0909 EDT on July 15, 2026, the Program was notified of a damaged shutter on a fixed gauge. This notification is being submitted in accordance with applicable Georgia Radiation Control regulations requiring prompt notification and written follow-up regarding equipment…

Cigar Lake Mine Resumes Production

Cameco · News · Cameco (TSX: CCO; NYSE: CCJ) announced today that its Cigar Lake mine in northern Saskatchewan has resumed production following a temporary suspension due to challenges at Orano’s McClean Lake mill, where Cigar Lake ore is processed.

Paluel 4: reconnection to the power grid

EDF, 14/07/2026: «Actualité de l’unité de production n°4 du réseau électrique national». Etiquetas: Production. Ce mardi 14 juillet à 3h10, l’unité de production n°4 de la centrale nucléaire de Paluel a été reconnectée au réseau électrique national. Elle avait été déconnectée du réseau électrique le lundi 13 juillet à 15h à la suite d'un aléa technique nécessitant le déclenchement des mécanismes de protection de la t…