The licensee reported two
tritium exit signs missing from stores in Crawfordsville, IN (SN 368230, manufacturer -Isolite, Activity - approximately 10 Ci) and South Hill,
VA (SN 320031, manufacturer - unknown, activity - unknown). The missing signs were identified during a remove and replacement effort of the
tritium exit signs company wide. Both signs were accounted for in an inventory of the signs in the spring of 2008. An investigation was performed by company personnel to determine the disposition of the signs. Upon completion of the investigation it was determined that the signs could not be located and their final disposition was unknown.
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.
This source is not amongst those sources or devices identified by the
IAEA Code of Conduct for the Safety & Security of Radioactive Sources to be of concern from a radiological standpoint. Therefore is it being categorized as a less than Category 3 source