The following information was provided by the
Colorado Department of Public Health and Environment (the Department) via email:
The licensee prepared a shipment of samples in petri dishes containing Pu-239 (0.0869 uCi) and Sr-90 (0.0865 uCi) evenly distributed on 32 planchets with TDS [technical data sheet(s)] on November 3, 2025. The samples were sealed in a box which was vacuum sealed and labeled with a label detailing the package contained radioisotopes. On November 4, 2025, a shipping tracking number could not be located. The shipping department lead contacted the radiation safety officer. Efforts were made following this communication to find the missing package by contacting customers who had received other dangerous goods shipments from that day. No samples were found before the incident was reported by phone and in writing to the Department on December 1, 2025. Corrective actions have not been determined by the licensee at this time and further investigation by the unit is ongoing.
Colorado Event Number: CO250045
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