The following is a synopsis of information received via E-mail:
Upon inventory inspection, Frenchman Valley discovered that two tritium exit signs that had been in their possession had been replaced. The property was then thoroughly searched twice and the signs were not located. The whereabouts of the signs are unknown and no replacement records were found.
The signs were manufactured by Isolite. Both signs were model SLX60. The serial numbers were 12-01067 and 12-01068 with each sign containing 8 Curies of tritium.
Nebraska Item Number: NE220002
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