Event Notification Report for August 07, 2026

MEDICAL EVENT

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

"A routine yttrium-90 (Y-90) microsphere radioembolization treatment performed in the hospital on July 29, 2026. The radiopharmaceutical used in this treatment, Y-90 microspheres, are manufactured under the brand name Therasphere, which is produced by Boston Scientific (Marlboro, MA, USA). In this procedure, a catheter is guided through the patient's vasculature until it reaches the blood vessels feeding a tumor in the liver. From this position, the radiopharmaceutical is administered to the tumor by injection through the catheter. During the procedure, the radiopharmaceutical was administered by an authorized user (AU) on July 29, 2026. The treatment was delivered as planned, with 13.5 mCi administered to a hepatocellular carcinoma tumor in the left lobe of a patient's liver. Post-treatment Bremsstrahlung imaging was performed to verify localization of the radiopharmaceutical. Later, an AU interpreted the post-treatment imaging and identified distribution of the radiopharmaceutical to the stomach and spleen. Dose projections are forthcoming due to the complexity of the procedure. The licensee is working through the investigation of the incident and will follow the NRC guidelines for communicating with the patient and submitting a written report."

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 - DAMAGED GAUGE

The following information was provided by the Texas Department of State Health Services (the Department) via phone and email:
"On July 30, 2026, the Department was notified by the licensee's radiation safety officer (RSO) that while performing a walk around of the equipment on a wellsite near Dilley, Texas, the technician noticed a Berthold LB8010 gauge with the shutter handle and shaft missing. Using a survey meter, they discovered that the shutter was in the open position and could not be closed. The gauge was transported to the Pearsall facility in a Type A container and placed into storage. The RSO stated the gauge will be transported to their Odessa, Texas facility where it will be disposed of at their next schedule disposal at the end of 2026. The source's activity is 20 mCi and the nuclide is Cesium-137. No overexposures occurred due to this event.

"Additional information will be provided as it is received in accordance with SA-300."

Texas Incident Number: 10314

Texas NMED Number: TX260029

INVALID SPECIFIED SYSTEM ACTUATION

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

"This 60-day telephone notification is being made in accordance with the reporting requirements specified by 10 CFR 50.73(a)(1) and 10 CFR 50.73(a)(2)(iv)(A) for the invalid actuation of an emergency diesel generator (EDG).

"On June 8, 2026, at approximately 0815 EDT, during prerequisite activities for system maintenance, the 'E' EDG started due to an invalid actuation of the EDG emergency mode start logic. This condition was caused by improper installation of a switch jumper that prevented isolation of the 'E' EDG emergency mode start logic. The 'E' EDG and its support systems functioned as designed. Since the actuation was not initiated in response to actual plant conditions, it was not an intentional manual initiation, and there were no parameters satisfying the requirements for initiation of the systems, this event has been determined to be an invalid actuation."

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

"The NRC Resident Inspector has been notified."

AGREEMENT STATE REPORT - MEDICAL EVENT

The following information was provided by the New Jersey department of environmental protection (NJ DEP) via email:

On July 29, 2026, at the Robert Wood Johnson University Hospital in New Brunswick, New Jersey, the licensee was administering a Y-90 SIR-Sphere therapy of 63.45 mCi to a patient. During the procedure, the patient unexpectedly coughed, which caused the treatment catheter to move away from the treatment site. The intended dosage was 63.45 mCi, but the administered dosage was 25.55 mCi to the intended site (the liver) and 37.9 mCi to the wrong site (a different part of the liver). The incident is being managed by the radiation safety officer.

NJ event number: TBD

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.