Current Event Notification Report for July 24, 2025

AGREEMENT STATE REPORT - LOSS OF CONTROL OF RADIOACTIVE MATERIAL

The following information was provided by the Florida Bureau of Radiation Control (BRC) via email:

"The BRC received notification from Cardinal Health that a courier, employed by a courier company, was involved in a traffic stop resulting in an arrest. The courier was transporting a radioactive materials package containing one 5 mCi I-131 source at the time of the arrest. The transporting vehicle was then held at a towing company storage, with the towing company stating an intent to retain all impounded material until proper permissions could be received from the vehicle owner. The towing company was informed that they must release the material to Cardinal Health and have agreed to comply."

Florida Incident Number: FL25-069

AGREEMENT STATE REPORT - STUCK SHUTTER

The following is a summary of information received from the Alabama Office of Radiation Control (the Agency) via email:

"On July 16, 2025, at 0914 CDT the Agency received a call from the radiation safety officer (RSO) for INEOS Styrolution American, LLC. stating that during regular shutter checks, the shutter for the Ronan Model SA1-F37 Serial No. 8171GK, with 5000 millicuries cesium-137 would not close. The facility contacted RSO Services to schedule repair of the device. The facility has a maintenance outage scheduled in September of this year.

"The Agency will provide more information as the investigation continues."

Alabama Incident Number: 2025 25-02

AGREEMENT STATE REPORT - EQUIPMENT FAILURE

The following report was received by the Illinois Emergency Management Agency (the Agency) via phone and email:

"The Agency was contacted this afternoon (7/17/25) by Isomedix Operations, Inc. in Libertyville, IL to advise of a reportable equipment failure.

"According to the report, the radiation monitor used to perform required radioactivity measurements of the pool water (e.g., leak testing of the pool irradiator sources) failed at some point in the last month. It was discovered yesterday, 7/16/25, during a routine monthly check when the system failed to alarm when tested with a check source.

"Replacement monitoring equipment was installed, and the pool water was determined to be free of radioactivity. This incident had no impact to public or worker safety, nor is there any indication of leaking sources. However, the reportable criteria in 32 Illinois Administrative Code 340.122(c)(2) appear to have been met. The licensee met the 24-hour reporting requirement, and the Agency will report the matter to the NRC shortly.

"Inspectors will conduct a reactive inspection to determine root cause and corrective action."

Illinois Item Number: IL250028

MANUAL REACTOR SCRAM

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

"At 1510 [EDT] with Unit 1 in mode 1 at 96 percent reactor power, the reactor was manually scrammed due to loss of main transformer cooling. The scram was not complex, all systems responded normally post-scram. Main turbine bypass valves opened automatically to maintain reactor pressure.

"Operations responded to stabilize the plant. High pressure coolant injection momentarily injected into the reactor vessel and was subsequently placed in standby. Reactor water level has stabilized and is being maintained with the '1B' reactor feed pump. Decay heat is being removed by discharging steam to the main condenser using the turbine bypass valves. Unit 2 was not impacted. Due to the reactor protection system actuation while critical and the emergency core coolant system discharge to the reactor coolant system, this event is being reported as a four-hour and eight-hour non-emergency notification per 10 CFR 50.72(b)(2)(iv)(B), 10 CFR 50.72{b){2)(iv)(A), and 10 CFR 50.72(b)(3)(iv)(A).

"The Unit 1 reactor is currently stable in mode 3. An investigation is in progress into the cause of the loss of main transformer cooling. There was no impact to the health or safety of the public or plant personnel. The NRC Resident Inspector has been informed. The state of Pennsylvania has been informed."