The following report was received via e-mail:
Manufacturer: Isolite, Model # SLX 60, 10 Ci tritium,
[Tritium exit signs were shipped from the] manufacturer on 2/5/2009. The serial number of the isotope was not provided. Further information was requested from the company
In processing the annual general license reports from CDPHE [Colorado Department of Public Health and Environment] one exit sign was not located. The sign is being reported as lost/abandoned. The company contact will continue to search for the sign, however, [the company] is reporting it as lost.
Signs were purchased as part of a construction project in which 2 of the 10 signs ordered were not installed in the building. It may be in storage but it has so far not been located.
Colorado Event: CO16-I16-16 CO 160009
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