The following was received from
Colorado via email:
The facility manager completed the documentation for the 2016 Annual General License reports. During his inspection, only 2 of the 4 Tritium exit signs were reported. It is unknown as to what may have occurred with the other two signs as staff has changed since the signs were designated to be used at the facility.
Pictures were submitted showing the labels on the existing two signs located within the modern fold doors at the school. No serial number was provided on the label from the manufacture Shield Source. The distributor, Isolite, did report serial numbers on the quarterly report to the state.
Colorado Report # CO16-I16-09
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