Event Notification Report for September 05, 2025

STUCK OPEN SHUTTER

The following is a summary of information provided by the licensee via phone:

On August 28, 2025, an authorized user notified the radiation safety officer that the shutter of a fixed Ohmart/Vega SHF1A source holder with a 50 mCi Cs-137 source could not be closed while preparing for a routine inspection of a process vessel. The entrance to the process vessel was barricaded. A do-not-operate tag was placed on the source holder shutter handle. Communication of the event to facility personnel is in progress. The manufacturer stated that the model of source holder is no longer in production and must be replaced. There were no overexposures due to this event.

AGREEMENT STATE REPORT - STUCK OPEN GAUGE SHUTTER

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

"On August 28, 2025, the Department was notified that the shutter on a Vega SHF2C-45 nuclear gauge had failed in the open position during routine testing. The gauge contains a 500 mCi cesium-137 source. Open is the normal position for the shutter. The licensee reported there is no risk of additional radiation exposure to members of the general public or radiation workers, due to this on/off mechanism failure. Additional information will be provided as it is received in accordance with SA-300."

Texas incident number: 10219
NMED number: TX250039

AGREEMENT STATE REPORT - LEAKING SOURCE

The following information was provided by the New York State Department of Health (NYSDOH) Bureau of Environmental Radiation Protection (BERP) via email:

"NYSDOH BERP received a phone call from the U.S. Nuclear Regulatory Commission (U.S. NRC) on August 29, 2025, at approximately 1045 EDT to report a call they received from Gentech Scientific, LLC, a NYSDOH radioactive material licensee, to report a leaking electron capture device (ECD) source. NYSDOH contacted Gentech Scientific, LLC on August 29, 2025, at approximately 1100 to follow up on this event. The representative from Gentech Scientific confirmed that a leak test was performed and analyzed by the National Leak Test Center (NYSDOH radioactive material license number C2323) the day prior (August 28, 2025) on entrance port, housing, and exit ports of an Agilent 58-90 ECD (serial number K3818) containing 15 millicuries of Ni-63 (foil source).

"Only the entrance port sample returned a result considered leaking in accordance with 10 CFR 31.5(c)(5) at 6789 pCi. The housing and exit port samples did not exceed this threshold.

"Following Gentech Scientific, LLC's awareness of this event, the affected device/source was carefully placed into isolation/quarantine in laboratory storage area, posted with signage, and licensee staff were informed on this event and instructed to keep away from this device. This leaking source did not result in the contamination of equipment, personnel, or surfaces.

"Gentech Scientific, LLC has notified Agilent of this leaking source and will be seeking options to return this device to Agilent or otherwise dispose of the source via transfer to a licensed waste broker. Leak test copies have been provided to NYSDOH.

"NYSDOH BERP is actively monitoring this event under Incident No. 1542. Additional information will be provided to NMED once available."

AGREEMENT STATE REPORT - MEDICAL EVENT

The following information was provided by the New Mexico Environment Department Radiation Control Bureau via email:

"One of our licensees Kaseman Presbyterian Hospital reported a medical event of a patient being administered 5 mCi of Ga-68 dotatate rather than Ga-68 PSMA [prostate-specific membrane antigen] on 8/28/2025, in Albuquerque New Mexico, license number MI-114-4. Written report is expected in 15 days. Further details will be provided as they become available."

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.

UNANALYZED CONDITION

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

"On September 4, 2025, at 1110 EDT, it was determined that the units are in an unanalyzed condition. A review of DC control circuit protection schemes identified circuits which are uncoordinated due to inadequate fuse sizing. This results in a concern that postulated fire damage in one area could cause a short circuit without adequate protection, leading to the unavailability of equipment credited for 10 CFR 50 Appendix R safe shutdown. This condition is not bounded by existing design and licensing documents; however, it poses no impact to the health and safety of the public or plant personnel. Therefore, this event is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(ii)(B).

"Compensatory actions for affected fire areas have been implemented.

"The NRC Senior Resident Inspector has been notified."

SECONDARY CONTAINMENT HATCH LEFT UNSECURED

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

"On September 4, 2025, at 0855 CDT, Grand Gulf Nuclear Station operators discovered the enclosure building roof hatch was unsecured and open approximately 1 inch. This resulted in inoperability of secondary containment.
Following discovery, the hatch was immediately closed and latched. Secondary containment operability was restored at 0940 CDT.

"This event is being reported under 10 CFR 50.72(b)(3)(v)(D) as an event or condition that could have prevented fulfillment of a safety function.

"The NRC Resident Inspector has been notified."