Event Notification Report for September 28, 2026

AGREEMENT STATE REPORT - STUCK-OPEN GAUGE SHUTTER

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

"On September 17, 2026, the license notified the agency regarding a gauge whose source shutter mechanism had failed to function as intended. The gauge, a Texas Nuclear model 5205, contains a 100 mCi Cs-137 sealed source. The licensee reported that the gauge was discovered with the source shutter stuck in the open position. Open is the normal operating position. The discovery was made by the licensee on September 17, 2026, during a routine inspection.

"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. The licensee has contacted a service provider to have the gauge repaired.

"Additional information will be provided in accordance with SA300 Reporting requirements."

Texas incident number: 10330
NMED number: TX260040

LEAKING SEALED SOURCE

The following information was provided by the licensee via phone:

On September 17, 2026, at 1300 CDT, the DHA radiation safety officer (RSO) at Fort Sam Houston was notified of a leaking 13.6 mCi Ni-63 sealed source from a gas chromatograph.

Wipes and leak tests were conducted. The wipes tested positive and the RSO is awaiting the results of the leak test. There were no reported exposures. The notification is being made in accordance with 10 CFR 31.5(c)(5).

Gas chromatograph information:
Manufacturer Agilent Technologies
Model: 7890A
S/N: US 13371009

OFFSITE NOTIFICATION

The following information was provided by San Onofre Nuclear Generating Station (SONGS) via phone and email:

"On September 23, 2026, between approximately 2000 and 2200 PDT, a planned wastewater transfer continued after the intended transfer period, resulting in an unplanned discharge of approximately 5,000 gallons into the Unit 2 storm drain/intake pathway rather than completing the intended controlled wastewater discharge path. The Unit 2 intake conduit leads to the Pacific Ocean. The source of the water was mostly groundwater, with some concrete cutting water.

"On September 24, 2026, at 1457 PDT, SONGS notified the San Diego Regional Water Quality Control Board of the unplanned discharge associated with the SONGS NPDES [National Pollutant Discharge Elimination System] permit. This NRC notification is being made under 10 CFR 50.72(b)(2)(xi) based on the notification to an offsite government agency.

"Samples were collected at three locations for analysis. [Total suspended solids] (TSS) was 16 mg/L and pH was 10.6. Oil and grease laboratory results are pending. Tritium was detected at an approximate level of 3000 picoCuries/L. The pH value is in excess of the permit level of 9. The remaining sample values were within limits. Based on these preliminary analytical results and currently available information, Southern California Edison does not believe the release poses a threat to ocean water quality."

The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:

SONGS will notify NRC Region IV of this event.

AGREEMENT STATE REPORT - MEDICAL EVENT

The following information was provided by the Kentucky Department for Public Health and Safety, Radiation Health Branch, via email:

"During a Y-90 microsphere procedure performed on September 18, 2026, a spill occurred that resulted in the patient receiving approximately 75.7 percent of the prescribed dose.

"Because the administered dose differed from the prescribed dose by greater than 20 percent, this event meets the definition of a reportable medical event. In accordance with reporting requirements, notification was provided by telephone to the Kentucky Radiation Health Branch on September 18, 2026, at approximately 1345 EDT.

"The authorized user has reviewed the event and determined that the delivered dose is sufficient for treatment of the affected lobe [of the liver]. No additional treatment of that lobe is planned. Any future treatment will be performed under a separate written directive. The authorized user communicated this to the patient.

"A written report, containing all information required under 10 CFR 35.3045(d), will be submitted within 15 days of discovery."

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.

AGREEMENT STATE REPORT - CONTAMINATED PACKAGE

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

On September 21, 2026, Kettering Health Network notified the Department by email that a radiopharmaceutical package containing 10 mCi of F-18 positron emission tomography (PET) material exceeded removable contamination limits established in Ohio Administrative Code 3701:1-38-18, which references limits in 49 CFR 173.443.

The event occurred on September 17, 2026. Contamination on the exterior case was 10,197 disintegrations per minute (dpm), the syringe pig was 2,303 dpm, and the syringe body was 4,848 dpm. The exposure rate on contact was 0.8 mR/h and at one meter was 0.1 mR/h. The licensee implemented appropriate handling precautions and stored the package for decay, which decayed below regulatory limits by end of day. The licensee attempted to contact the radiopharmacy on the same day as the event but could not make contact until the next day.

The radiation safety officer (RSO) was notified by phone on the day of the event. A written report was provided to the RSO on September 18, 2026, but the RSO was out of office. The licensee was reminded that they must notify the Department immediately when a package survey exceeds regulatory limits.

The radiopharmacy responsible, PETNET, is due for their routine inspection. This inspection will be prioritized, and the incident will be reviewed again during the routine inspection.

Ohio item number: OH260007