The following information was provided by the licensee via phone and email:
While finishing the renewal of our license, I was not able to account for one device found in a 2016 inventory, the number of devices matched the number of devices listed on our 2016 license.
Both the license and inventory from 2016 listed 10 devices, I could only account for 9 devices.
On the 11th of April, documentation was found in our property management system that listed the device as transferred to an outside agency, agency is unknown.
The last leak test preformed on this device was in 2013, so the condition of the shielding in 2016 is not known, when it was transferred.
The missing device is a Troxler model 3411 device serial number is 13760.
The device contains two sources americium-241 with 44 millicuries at 1.480 giga becquerels (SN 47-9073), and cesium-137 with 9 millicuries at 0.296 giga becquerels (SN 50-2578)
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.pdfThe following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance: