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| Entered date | Event description | |
|---|---|---|
| ENS 51736 | 16 February 2016 10:05:00 | Pursuant to Federal Regulation 10 CFR 31.5(a), Dominion Transmission, Inc. is a general licensee of the NRC because it possesses and uses byproduct material in the form of tritium exit signs (TES). Consistent with Federal requirements, Dominion is providing the subject report regarding two (2) lost TES. Dominion has established a company-wide program to inventory TES. Inventory efforts have identified that the following TES which were present at the previous inventory cannot be located and are presumed lost: Serial Number: CO563528 Model Number: BX Activity: 20 Curies Serial Number: CO563530 Model Number: BX Activity: 20 Curies Dominion conducted this most recent inventory during a recent construction re-modeling project involving the building of a new addition at its Lightburn Station. Dominion has no information that these TES have been transferred. Accordingly, and in addition to physical searches for the TES conducted by Dominion, Dominion interviewed key on-site personnel, contractors and vendors who had worked on the site. Interviewed personnel include the Dominion project manager, site safety personnel and the lead contractor who performed the demolition. None of these interviewees recall disposing of the TES. Dominion also contacted the local trash removal services (C and D Dumpster) and they have confirmed that a dumpster was removed from the site during the remodeling project. Dominion therefore contacted S and S Landfill. S and S Landfill has no equipment available to monitor for radiation levels and consequently could not provide us with any relevant information as to the possible disposition of these TES. As a result of these investigative efforts, Dominion concluded that these TES are lost. We have also confirmed that all other TES are currently in place at the Lightburn Station facility. 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 |