Event Notification Report for January 22, 2025

EN Revision Imported Date: 1/22/2025

EN Revision Text: AGREEMENT STATE REPORT - LOST EXIT SIGNS

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

Four exit signs, each containing 12.57 curies of tritium (50.28 curies total), were determined to be lost by the licensee.

Manufacturer: Isolite Corporation
Model Number: SLX60

Colorado event number: CO240025

* * * UPDATE ON 01/21/2025 AT 1458 EST FROM KATHRYN KIRK TO KERBY SCALES * * *

The following update was submitted by the Colorado Department of Public Health and Environment via email:

The four exit signs initially reported as lost have been found.

Notified R4DO (Deese), NMSS Events Notifications (email), 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 - DAMAGED SOURCE / UNPLANNED CONTAMINATION
The following information was provided by the Texas Department of State Health Services (The Department) via email:

"On January 14, 2025, the Department was notified by the licensee's radiation safety officer (RSO) who reported a source had been damaged. The RSO could not provide specific information on the source other than that it was a resin bead source containing 200 millicuries (original activity) of cesium - 137 contained in a plastic vial. The RSO stated they had been notified on January 13, 2025, at 1430 hours (CST) that the plastic capsule that contained the resin was found cracked and some of the resin had leaked out of the source and onto the floor. The area of the spill was isolated. They performed contamination surveys and found the contamination was contained in the room where the source was used. They surveyed all personnel who had entered the room and no individual was found to have been contaminated. The room was decontaminated and all but a few spots had been cleaned to background levels. The remaining areas were covered with a gel type material to trap the contamination and, when removed, should remove the contamination. The RSO will provide additional information on the source later.

"Additional information will be provided as it is received in accordance with SA-300."

Texas NMED number: TX250002
Texas Incident number: 10154

AGREEMENT STATE REPORT: DAMAGED GAUGE
The following information was provided by the Texas Department of State Health Services (The Department) via email:

"On January 14, 2025, the Department was notified by the licensee that on January 13, 2025, a Vega model SH-F2 shutter failed to close during routine testing. The gauge contains a 1,000 millicurie (original activity) cesium - 137 source. Open is the normal operating position for the gauge. The licensee stated there is no risk of radiation exposure to members of the general public or radiation workers due to the failure. The licensee will contact a service provider to schedule repair of the gauge. Additional information will be provided as it is received in accordance with SA-300."

Texas NMED number: TX25003
Texas Incident number: 10155