Event Notification Report for November 12, 2026

AGREEMENT STATE REPORT - LOST SOURCES

The following information was provided by the Ohio Department of Health, Bureau of Environmental Health and Radiation Protection (the Department), via email:

"After performing an onsite inspection, an inspector determined that the licensee had potentially lost two standard cesium-137 calibration sources. The two sources were a rod source containing 0.5 microcuries of Cs-137, serial number 1113-11-40, dated 5/1/2005, and a vial source containing 205.5 microcuries of Cs-137, serial number 76910, dated 3/1/2006. The licensee is a private cardiovascular physician's office which has not performed nuclear procedures for four years. During the inspection, the licensee could not account for the two calibration sources that were listed on their last sealed source inventory record, which was outdated by a few years. The licensee was given 24 hours to account for the sources in case they were transferred or found post inspection. The licensee failed to update the status of the sources and the Department has determined the sources were lost. The results of this inspection and potential findings are still pending. This event will remain open until the inspection is closed."

Ohio incident number: OH260008

THIS MATERIAL EVENT CONTAINS A 'Less than Cat 3' LEVEL OF RADIOACTIVE MATERIAL

Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf

AGREEMENT STATE REPORT - STUCK OPEN SHUTTER

The following information was provided by the Alabama Department of Public Health (the Agency) via email:

"On the afternoon of November 3, 2026, the Agency received a call from the licensee to report a shutter stuck in the open position. The device is a Vega Americas Model SR-A with serial number 42ND01, containing a 50 mCi Cs-137 source with serial number M0306 and an assay date of April 1, 1986. The device is located in the chute of a bucket elevator that requires a crane to access. No work on or in the vessel to which this gauge is attached will be performed until the device is removed. The licensee will use a third-party service provider to remove the gauge and either repair the shutter or dispose of it as soon as the service provider has a crane on-site."

Alabama incident number: 26-20

AGREEMENT STATE REPORT - LOST SOURCE

The following information was provided by the Massachusetts Department of Public Health (the Agency) via email:

"On November 2, 2026, the licensee reported that a device containing a generally licensed sealed source had been transferred some time in 2023. The licensee does not have record of transfer, so the Agency considers this a lost source. The device is an X-ray fluorescence device containing a 30 mCi Am-241 sealed source. The device manufacturer is Thermo Scientific Portable Analytical Instruments Inc.; model number XLP818QP; serial number 8895; and the source is a 30mCi source of Am-241.

"The reporting requirement is immediate and is 105 CMR (Code of Massachusetts Regulations) 120.281(A)(1), missing licensed radioactive materials in aggregate quantity equal to or greater than 1000 times quantity specified in 105 CMR 120.297, Appendix C. The Agency considers this event to be open."

THIS MATERIAL EVENT CONTAINS A 'Less than Cat 3' LEVEL OF RADIOACTIVE MATERIAL

Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf

AGREEMENT STATE REPORT - UNPLANNED CONTAMINATION

The following information was provided by the Texas Department of State Health Services via phone and email:

"On October 30, 2026, while changing out a rubidium-82 generator, the technician exchanging the generator observed a leak which resulted in an estimated 3-milliliter release of liquid. It was determined the liquid contained radioactive material. The technologist attempted to clean up. He thought he had it mostly cleaned up but discovered there were spots on the floor, from an apparent contamination of the technician's footwear. The room was closed to use. On Monday November 2, 2026, the room was surveyed, and extensive cleanup was started. The contractor who provides the technologist, the camera, and the isotope, was engaged to perform the continued cleanup. They sent in one team, and a second team is being assembled for a more thorough cleaning. An updated report (November 4, 2026) from the consulting physicist shows estimated activity of 1.7-2.0 mCi of strontium-82, which is 4-6 times the annual limit on intake (ALI) threshold of 450 microcurie for reporting and the presence of 0.9-10.4 mCi of strontium-85 which is below the ALI threshold of 10mCi for that isotope. Any rubidium-82 with a half-life of 75 seconds was already decayed and is not considered.
"Additional information will be provided in accordance with SA300 reporting requirements."

Texas incident number: 10343
Texas NMED number: TX260045

AUTOMATIC REACTOR TRIP

The following information was provided by the licensee via phone and email:

" At 0512 CST on 11/10/2026, with Unit 1 at 100 percent power, the reactor was automatically tripped due to a main generator lockout. The cause of the generator lockout is currently under investigation.

"The plant is in mode 3. Decay heat is being removed by atmospheric dump valves. Unit 2 is unaffected.

"This event is being reported pursuant to 10 CFR 50.72(b)(2)(iv)(B).

"The Resident Inspector has been notified."

FITNESS FOR DUTY

The following information was provided by the licensee via phone and email:

"On November 10, 2026, at 2333 CST, Waterford Steam Electric Station, Unit 3, was notified that a non-licensed Entergy supervisor had confirmed positive for alcohol during a for cause fitness for duty test. The individual's access has been terminated.

"The fitness-for-duty policy violation is being reported under 10 CFR 26.719(b)(2)(ii).

"The NRC Senior Resident Inspector has been notified."