The following report was received from the
California Department of Public Health via email:
On August 23, 2016, NRC [Nuclear Regulatory Commission] contacted RHB [California Radiation Health Branch] to inform of an incident involving missing Tritium signs. According to NRC report, the AT&T EH&S RSO [Environmental Health and Safety Radiation Safety Officer], Kim Kantner, contacted NRC to report six missing H-3 [Tritium] signs from one of their locations at 730 Carolina Street, Vallejo, CA. Each sign contained 2.7 Ci of H-3.
These six signs were in a box to be returned to the vendor, stored inside a locked basement at the Vallejo AT&T facility. Some renovations were going on at this site. According to Kim, AT&T still believes that the box may have been misplaced by the workers. The investigation is still ongoing.
RHB will be following up on this matter.
CA 5010 Number: 082316
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