A
Troxler Model 3440 (S/N 18635) containing two sources, i.e., 8 millicuries
Cs-137 and 40 millicuries
Am-241/Be, was
stolen from the
Indiana Department of Transportation field office in Elkhart,
Indiana. The field office was broken into during the weekend and
Troxler gauge was found missing from a locked closet. The licensee will conduct an investigation and inform their local law enforcement.
The licensee notified the NRC Region 3 Office (Jim Lynch).
THIS MATERIAL EVENT CONTAINS A "CATEGORY 3" LEVEL OF RADIOACTIVE MATERIAL
Category 3 sources, if not safely managed or securely protected, could cause permanent injury to a person who handled them, or were otherwise in contact with them, for some hours. It could possibly - although it is unlikely - be fatal to be close to this amount of unshielded radioactive material for a period of days to weeks. These sources are typically used in practices such as fixed industrial gauges involving high activity sources (for example: level gauges, dredger gauges, conveyor gauges and spinning pipe gauges) and well logging. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf
Although IAEA categorization of this event is typically based on device type, the staff has been made aware of the actual activity of the source, and after calculation determines that it is a Category 3 event.
Note: the value assigned by device type "Less than Cat 3" is different than the calculated value "Category 3