CBRN event in United States of America on Thu 1st January 2026

The following is a summary of information provided by the Colorado Department of Public Health and Environment via email: The licensee reported two exit signs, containing 7.5 Ci of tritium each, were lost in Denver, Colorado. Manufacturer: Isolite Corporation Model number: SLX60 Colorado event number: CO260001 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