Event Notification Report for April 15, 2026

AGREEMENT STATE REPORT - MEDICAL EVENT

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

"On April 6, 2026, a patient was receiving the sixth of six administrations of Lu-177 (Pluvicto). The first five administrations had been prescribed at 200 mCi. All were delivered in accordance with their written directive. The sixth administration prescribed a reduced dosage of 160 mCi. The licensee administered a dosage of 199.4 mCi, 25 percent greater than the written directive. While performing a written directive review following the administration, the licensee identified that the incorrect dosage was administered, and it was immediately reported to the licensee's office of radiation safety.

"The referring physician and the patient were both notified of the medical event. The referring physician does not believe the increased dosage will have any adverse effects on the patient. The licensee is preparing a written report for the Department. The Department will follow up with an investigation."

Wisconsin event report number: WI260007

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 - 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