The following information was received via e-mail from the
Colorado Department of Public Health and Environment:
The general license section of the Radioactive Materials Program sent out annual notifications requesting response regarding tritium exit signs reported in use at locations given by the manufacturer. Upon an audit of the annual mailing for non-responders, Envision Inc. was contacted. After a complete inspection of the base store they are reporting the store was remodeled approximately 8 years ago; at that time the 4 tritium exit signs were removed. It is unknown if the exit signs were lost, destroyed or placed into the dumpster with the debris from the demolition. No further information is available due to time of reporting loss and lack of response by Envision Inc.
Number of Tritium exit signs were 4, Model #2040. Since Isolite Corporation did not report serial numbers on quarterly reports in 2001, no serial numbers are available. Each tritium exit sign contained 7500 mCi [milliCuries] of H-3, they were shipped from Isolite on 9/28/2001.
CO Event Report ID No.: CO17-0005
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