Event Notification Report for October 09, 2026

UNPLANNED CONTAMINATION EVENT

The following information was provided by the licensee via phone:

The licensee's radiation safety officer was notified on September 30, 2026, at 1431 EDT, that 4 improved chemical agent detectors were inadvertently shredded at an industrial shredder facility located in the Marine Corps Logistics Center in Albany, GA. The detectors each contained a 15 mCi Ni-63 source. The sources were shipped from Germany with an intended destination in Kentucky. It is unknown how the detectors were sent to the disposal facility.

The waste from the industrial shredder ended up in a dedicated Department of War landfill. The US Navy is in charge of the clean-up and decontamination operations at the shredder. Results from surveys and wipes of the shredder were all less than the minimum detectable activity.

AGREEMENT STATE REPORT - GAUGE SHUTTER STUCK OPEN

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

"On October 1, 2026, the licensee notified the Department that the source shutter mechanisms on two gauges failed to function as designed. Both gauges are VEGA SH-F2B models, each containing a 200 mCi cesium-137 sealed source. The licensee reported that the shutters on both gauges were found to be stuck in the open position. Open is the normal operating position. The licensee stated that there is no risk of additional radiation exposure to members of the public or radiation workers due to this on/off mechanism failure.

"Additional information will be made available in accordance with SA 300 Reporting requirements."

Texas Incident Number: 10333
Texas NMED number: TX260042

MEDICAL EVENT

The following information was provided by the licensee via phone:

On September 30, 2026, a research study participant received approximately 40 percent of a prescribed dose of actinium-225 (64.79 microcuries of 162.16 microcuries). The dosage was being administered intravenously, and the study protocol was followed, however, leakage was detected during dose administration. The likely source of the leakage was from an inline filter.

The patient and physician were notified. No patient harm is expected.

A Medical Event may indicate potential problems in a medical facility's use of radioactive materials. It does not necessarily result in harm to the patient.

MEDICAL EVENT

The following information was provided by the licensee via phone:

On September 24, 2026, a patient undergoing skin cancer treatment received 5 Gray from an Ir-192 high dose rate treatment to a site other than the intended treatment site. The treatment was delivered to a skin lesion anterior to the intended lesion in the written directive. The affected lesion had not been biopsied and was not indicated for treatment at that time.

The patient and physician were notified. No patient harm is expected.

A Medical Event may indicate potential problems in a medical facility's use of radioactive materials. It does not necessarily result in harm to the patient.

DEGRADED CONDITION

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

"On 10/07/2026, at 1654 CDT, during a refueling outage at zero percent power while performing local leak rate testing on the hardened containment vent system, which is part of the primary containment boundary, an engineering evaluation determined that the Unit 1 leakage rate did not meet 10 CFR 50 Appendix J requirements specified in Technical Specification 5.5.12. Leak rate testing identified excessive leakage through 1-FCV-064-0221, HARDENED CONTAINMENT VENT INBD ISOL VLV and 1-FCV-064-0222, HARDENED CONTAINMENT VENT OUTBD ISOL VLV. This event is being reported as an 8-hour, non-emergency notification per 10 CFR 50.72(b)(3)(ii)(A).

"There was no impact on the health and safety of the public or plant personnel.

"The NRC Resident Inspector has been notified."

UNANALYZED CONDITION

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

"The facility is in a safe and stable configuration and no accident has occurred.

"A question was raised as to whether Urenco USA (UUSA) is missing an accident sequence for sub-sampling an overfilled '1S' bottle (above the ANSI N14.1 limit) or if such an event can be determined to be not credible due to a series of unlikely human errors or events. Instances of overfilled '1S' bottles have occurred during the autoclave sampling process; however, these bottles are identified and removed from the sub-sampling process in accordance with established procedures. Those procedural steps are not preserved as an item relied on for safety (IROFS). No bottles have been sub-sampled that potentially needed an IROFS.

"Existing analyses address overheating of '1S' bottles normally filled for sub-sampling (less than or equal to 450 g), but do not specifically address an overfilled condition. Although '1S' sample bottles contain less than 1 kg of uranium hexafluoride (UF6), sub-sampling an overfilled '1S' bottle may result in a condition not currently evaluated in the integrated safety analysis (ISA).

"Corrective actions have begun."