| UNACCOUNTED FOR FISSION CHAMBER|
On October 24, 2019, during performance of an annual inventory, one fission chamber could not be accounted for. After a thorough search, the fission chamber was declared missing. The fission chamber was manufactured by Reuter-Stokes with a part number of: RS-P6-0805-134 and a serial number of: 14K024C5. The fission chamber contains 0.12988 grams of Uranium-235.
The last known accounting of this fission chamber was during the previous annual inventory. The licensee is continuing to search for the fission chamber.
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