The following summary was provided by the licensee via email and phone:
Two packages were tendered to a common carrier on July 1, 2022. One of two packages was lost during transport and handling. The last known status was at the common carrier's distribution facility in Memphis, TN on July 8, 2022. The lost package contains a liquid salt solution with an activity of 11.844 GBq (0.3201 Curies) of Thallium 201 (Tl-201). A written report shall be completed and submitted to the NRC pursuant to 10 CFR 20.2201(b). A search of the licensee's facility was not successful. An ongoing search is in progress at the Memphis facility.
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