Event Notification Report for December 24, 2025

EN Revision Imported Date: 12/24/2025<br><br>EN Revision Text: AGREEMENT STATE REPORT - LOST SOURCES

The following information was provided by the PA Bureau of Radiation Protection (Department) via email:

"On December 10, 2025, the Department was notified that the licensee may have lost two 100-millicurie americium-241 sealed sources (S/Ns 110790 and 113504). It is thought the loss occurred between June 2 and June 20, 2025, during clean-up activities in a maintenance area where the two sources may have been inadvertently disposed of in a roll-off container. The sources were used in Filtec model FT-50 fill gauges. The most recent leak test for the sources was completed, and passed, on June 1, 2025.

"The Department is in contact with the licensee, awaiting more information regarding any possible overexposures or contamination, and will update this document as more information is provided.

"The Department will perform a reactive inspection."

* * * UPDATE ON 12/23/2025 AT 0729 EST FROM JOHN CHIPPO TO IAN HOWARD * * *

The following information was provided by the Department via email:

"After interviewing staff at the facility, we learned that the licensee had three Filtec FT-50 gauges in storage - two sourced, and one unsourced. When the storage area was cleaned out, the gauges were put in a roll off dumpster that was sent to Daniels and Miller scrap recycling center in Greensburg, PA. On December 22, 2025, Daniels and Miller recovered a gauge with the source (S/N 113504) inside and intact. They are actively looking in the same location for the other gauge.

"There are several contributing factors that led to this incident. There was a lot of staff turn-over at the facility in the last few years, staff were inadequately trained, there was a lack of communication between departments, inadequate storage space for the gauges, and inadequate radiation signage."

Notified R1DO (Elkhiamy), ILTAB (Email), NMSS Events Notification (Email), and CNSC (Email)

PA Event Report ID: PA250017

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 - LOST RADIOPHARMACEUTICALS

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

"The Agency was contacted by GE Healthcare in Arlington Heights, IL to advise of a diagnostic radiopharmaceutical package lost in transit.

"The package contained one vial of In-111 oxyquinoline, with an activity of 3.2 mCi. It was shipped from the licensee's facility on Friday, November 14, 2025, for delivery to RLS USA, Inc. of Trevose, PA. The last tracking information has documented receipt at the [common carrier's] sort facility on Saturday, November 15, 2025, at 0100 CST. Although there were several conversations with [the common carrier] on the location of the package, communication today has confirmed that the package cannot be located. In addition, the customer has acknowledged that the package was never received.

"The package has currently decayed to less than 280 nanocuries and does not represent a public health hazard. There is no indication of intentional theft/diversion, nor that the contents have been separated from the packaging."

Illinois item number: IL250051

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

LOST FILL-LEVEL GAUGES

The following information was provided by the licensee via phone:

While performing a full asset audit, the licensee was unable to locate two generally licensed Industrial Dynamics model SP-50B/PL fill-level gauges each containing a 100 mCi Am-241 source. The specific date of the last inventory at the licensee's facility is unknown but estimated to be within the past five years.

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 - LOST EXIT SIGNS

The following is a summary of information provided by the Colorado Department of Public Health and Environment via email:

The licensee reported one exit sign, containing 7.62 Ci of tritium, was lost in Englewood, Colorado.

Manufacturer: Isolite Corporation
Model number: SLX60

Colorado event number: CO250047

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