Event Notification Report for October 01, 2023

AGREEMENT STATE - LOST/MISSING SOURCE

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

"On December 13, 2024, the Agency was advised of a licensee that returned an Agency invoice and informed fiscal that they were a closed location. A review of the license and most recent inspection report (April 2021) showed that the licensee was in possession of (1) Cs-137 sealed source. Agency staff conducted a reactive inspection which continued through January 16, 2025, and after extensive investigation, including radiation surveys conducted at the site and interviews of personnel involved, the source could not be traced or located. Therefore, the Cs-137 sealed source (N.A. Scientific, MED 3550 sealed source, serial number 20074, 220.9 microcuries on 6/1/2002) is being reported as a lost source.

"Current activity is calculated as approximately 131 microcuries. Investigation findings indicate the most likely scenario to be that the Cs-137 sealed source was accidentally thrown out as regular trash at some point during the shutdown of nuclear medicine operations at the site. It is believed the source was disposed of around October 2023. Given the time since disposal, it is unlikely any further investigation or corrective action is possible. After initiating appropriate enforcement action, licensing staff will facilitate proper termination of the license.

"Pending no further developments, this matter is considered closed."

Illinois item number: IL250002

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 SIGN

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

The licensee reported that one exit sign, containing 7.5 Ci of tritium, was lost in Aspen, Colorado.

Manufacturer: Safety Light Corp
Model number: 2040


Event report ID number: CO250037



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