Detected events

Wolf Creek 1 was taken offline (94% → 0%)

Arkansas Nuclear 1 increased its output from 20% to 62%

Arkansas Nuclear 1 returned to service (0% → 20%)

Farley 1 was taken offline (62% → 0%)

LaSalle 2 increased its power output from 66% to 100%

Quad Cities 2 increased its output from 65% to 100%

Browns Ferry 3 increased its power output from 65% to 100%

Comanche Peak 1 increased its output from 3% to 100%

LaSalle 2 reduced output from 100% to 66%

Quad Cities 2 reduced output from 100% to 65%

Browns Ferry 3 reduced its output from 100% to 65%

Comanche Peak 1 returned to service (0% → 3%)

Hope Creek 1 went offline (75% → 0%)

Arkansas Nuclear 1 went offline (90% → 0%)

Comanche Peak 1 went offline (100% → 0%)

Grand Gulf 1 reduced its output from 100% to 54%

Brunswick 2 increased its output from 70% to 100%

Brunswick 2 reduced output from 100% to 70%

D.C. Cook 2 went offline (49% → 0%)

Hatch 2 increased its power output from 48% to 92%

Saint Lucie 1 was taken offline (77% → 0%)

Comanche Peak 2 increased its output from 45% to 65%

Hatch 2 increased output by 8% → 48%

Comanche Peak 2 returned to service (0% → 45%)

D.C. Cook 2 reduced output from 100% to 48%

Hatch 2 returned to service (0% → 8%)

River Bend Unit 1 increased its output from 70% to 100%

River Bend Station 1 reduced its power output from 100% to 70%

Comanche Peak 2 was taken offline (100% → 0%)

Unit 2 was taken offline (100% → 0%)

Dresden 3 increased output from 20% to 100%

Dresden 3 returned to service (0% → 20%)

Clinton was taken offline (87% → 0%)

Hatch 1 increased its power output from 70% to 100%

Perry 1 increased its output from 80% to 100%

Quad Cities 1 increased its output from 27% to 100%

Browns Ferry 1 increased its output from 69% to 93%

Brunswick 1 increased its output from 70% to 100%

North Anna 1 went offline (89% → 0%)

Perry 1 reduced output from 100% to 80%

Quad Cities 1 reduced its output from 100% to 27%

Vogtle 4 went offline (78% → 0%)

Browns Ferry 1 reduced its output from 100% to 69%

Brunswick 1 reduced output from 100% to 70%

Hatch 1 reduced output from 100% to 77%

Sequoyah 2 increased its power output from 15% to 100%

Dresden 3 was taken offline (100% → 0%)

Catawba 2 was taken offline (94% → 0%)

Saint Lucie 1 increased its output from 57% to 92%

Sequoyah 2 reduced its output from 100% to 20%

Evento INES 3 · Roztoky u Prahy, museum (Chequia): Radiation worker exposure exceeding 10 times the annual limit

The museum in Roztoky near Prague operates an irradiation chamber that is used to destroy insects in collection items with gamma radiation. For this purpose, a sealed radionuclide source of Co-60 with an actual activity of 127 TBq on the date of the event is used. On 1. 9. 2025, a radiation worker was exposed to radiation by entering the irradiation chamber to bring another object into it for irradiation at a time wh…

Evento INES 2 · Bavaria / Company for Material Testing (Alemania): Worker Exceeded Annual Whole Body Dose Limit

On 19.08.2025, an employee of a company carried out a non-destructive testing using a Se-75 source with an activity of 1.95 TBq. When winding back the source into its safety position in a tube, the source detached from its holder, so that the source remained in the collimator. When the radiation officer entered the bunker his electronic radiation protection dosimeter gave a warning signal. The radiation officer cover…

Evento INES 2 · Nuclear Physics Institute, Praha (Chequia): Radiation worker exposure

On 13. 1. 2025, the lcencee reported a radiation emergency when an unplanned radiation exposure of a radiation worker occurred. The worker was in the radiation room with a source of ionizing radiation - the Chisostat SO 1 irradiator, which contained a sealed radionuclide source ("URZ") Co-60 with an activity of 30TBq as of 13. 1. 2025. At the time of the preparatory work, the source was not in a shielded position. Th…

LDS Church: AGREEMENT STATE REPORT - LOST EXIT SIGNS

AGREEMENT STATE REPORT - LOST EXIT SIGNS The following is a summary of information provided by the Colorado Department of Public Health and Environment via email: Two exit signs were declared lost by the licensee on December 19, 2024. The exit signs are model number BR-20-BK manufactured by SRB Technologies and have an H3 (tritium) source of 17.51 Ci each. Colorado Event Number: CO260015 THIS MATERIAL EVENT CONTAINS …

INES Level 3 Event · Hwaseong-si (South Korea): Worker Exposure Caused by a Radiation-Generating Device

In November 2024, a worker was exposed to radiation during the inspection of an X-ray device used for foreign object detection in manufactured products at a facility that produces and sells such devices. The worker was conducting performance improvement work on the device (80kV, 1.25mA) and, without turning off the power, inserted his hands into the machine to disassemble and reassemble the collimator, while X-rays w…

Wolf Creek: * * * This is not a new Part 21 condition. This EN will document all updates for this Part 21 condition, originally documented in EN 57243 and described below,

EN Revision Imported Date: 8/14/2026 EN Revision Text: PART 21 REPORT - NON-COMPLIANT INSULATED CONDUCTOR * * * This is not a new Part 21 condition. This EN will document all updates for this Part 21 condition, originally documented in EN 57243 and described below, that are made after November 2025. Refer to EN 57243 for updates made after the initial notification through November 2025. * * * The following is a synop…

INES Level 3 Event · Yongin-si (South Korea): Worker Exposure Caused by a Radiation-Generating Device

In May 2024, two workers at a semiconductor manufacturing company were exposed to radiation while inspecting an X-ray generator(60 kV, 100 mA) used for wafer thickness analysis. The workers were unaware that X-rays were being emitted and, in the process of identifying an malfunction of the device, they removed some components and inserted their hands into the machine to take photographs, during which they were expose…

Cinemark Century Bel Mar 16: AGREEMENT STATE REPORT - LOST EXIT SIGNS

AGREEMENT STATE REPORT - LOST EXIT SIGNS The following is a summary of information provided by the Colorado Department of Public Health and Environment via email: Forty-six tritium exit signs were declared lost by the licensee during the 2017 - 2021 timeframe. The exit signs are manufactured by SRB Technologies, Safety Light Corp., and Best Lighting Products. The total activity is 18.71 Ci of H-3. Colorado Event Repo…