Event Notification Report for April 16, 2026

AGREEMENT STATE REPORT - LOST SOURCE

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

"The Agency was contacted by GE Healthcare in Arlington Heights, IL, to report a package of diagnostic radiopharmaceutical was lost in transit. The last known location was the local airport. At the time of shipment on April 7, 2026, the package contained 100 millicuries of iodine-125. The shipment contained 8 boxes of radiopharmaceuticals, but when the courier attempted pickup, only seven boxes were present. The quantity of radioactive material, while decayed (now 19.6 mCi) and not a significant hazard to the public, requires immediate reporting to the Agency. The airport staff stated a search remains underway, however, the shipper has declared the package as lost."

Illinois event number: IL260011

* * * UPDATE ON 04/09/2026 AT 1211 EDT FROM GARY FORSEE TO ADAM KOZIOL * * *

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

"On April 9, 2026, the licensee advised the Agency that the package was found within the care of the courier and was delivered as intended. No contamination or exposures resulted, and this matter is considered closed."

Notified R3DO (Stoedter), NMSS Events Notification (email), and ILTAB (email)

THIS MATERIAL EVENT CONTAINS A 'Less than Cat 3' LEVEL OF RADIOACTIVE MATERIAL

Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf

AGREEMENT STATE REPORT - FOUND SOURCE

The following is a summary of information received from the California Department of Public Health, Radiologic Health Branch (RHB) via email and phone:

On April 1, 2026, at 0536 PDT, the licensee contacted Los Angeles County Radiation Management via email to report that a route truck activated their radiation alarm at a truck transfer station. RHB later arrived and identified the nuclide as radium-226. Arrangements were made with the licensee to dump the contents of the truck and locate the radiation source.

On April 6, 2026, at 0815, RHB arrived at the transfer station to meet with the licensee. The contents of the truck were dumped and surveyed. RHB was able to locate the radioactive source, a set of five vials with "radium luminous compound" labeling on several of the vials. Definitive measurements were recorded on April 8, 2026, due to instrument issues. Background was measured at 0.007 mrem/hr. Gross exposure rate at surface was 19 mrem/hr, 1.2 mrem/hr at 1 ft, and 0.1 mrem/hr at 3 ft. The projected activity is 120 microcuries. The source was secured and will be transferred for proper disposal.

California 5010 number: 040126

DEGRADED CONDITION

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

"On April 15, 2026, at 0920 EDT, while performing examinations of the 66 reactor vessel head penetrations, it was determined that two penetrations did not meet ASME Code Section XI [requirements]. Penetrations 54 and 59 will require repair prior to returning the vessel head to service. The indications were not through-wall and there was no evidence of leakage based on inspections performed on the top of the reactor vessel head. The examinations were being performed to meet the requirements of 10 CFR 50.55a(g)(6)(ii)(D) and ASME code case N-729-6 to find potential flaws/indications before they grow to a size that could potentially jeopardize the structural integrity of the reactor vessel head pressure boundary. This event is being reported as an eight-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."