The following information is a summary provided by the
Georgia Radioactive Materials Program via email:
On October 10, 2025, the licensee's radiation safety officer (RSO) noticed a missing calibration source from April 1, 2024, while reviewing sealed source inventory documents. The source had been marked absent, and the former RSO had initiated an investigation but did not leave any documents to address the whereabouts of the source. The RSO reported that they did have a disposal company to exchange and dispose of several sources during that time, however, there is no evidence the source in question was disposed of. Although the RSO is confident the source was disposed, they do not have the documents and do not believe they will be able to find them. The licensee was advised to reach out to the disposal company and inquire if they could account for the source. More information will be provided as it becomes available.
Missing source: 12 mCi, Cs-137, serial number 1104-30
Georgia Incident Number: 108
NMED Number: 2025-10-10
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