The following is a summary of information provided by the
Colorado Department of Public Health and Environment via email:
Two tritium exit signs were determined to be lost by the licensee.
Manufacturer: Isolite Corporation
Number of signs: 2
Model: BX-10-BK
Activity: 9.21 Ci each, H-3
The signs were discovered missing during an annual fire inspection on 03/05/2024.
Notifications: Colorado Regulations Section 4.51.1.1 (10 CFR 20.2201(a)(1)(i))
Colorado Event Report ID Number: CO240030
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