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| Entered date | Event description | |
|---|---|---|
| ENS 40530 | 18 February 2004 15:33:00 | USAF personnel in the Johnston Atoll in the Pacific were attempting to remove the "batteries" from an exit sign they believed to be battery powered. During the attempt to open the case, they destroyed the sign only to discover that it was a tritium sign. All tritium modules were broken. Five personnel were in the room at the time and all were potentially exposed to the tritium. The Radiation Safety Officer (RSO) isolated the room and the personnel clothing, etc. Pre-cleanup surveys indicated greater than 6 times the normal background survey readings in the room. The RSO double-bagged the sign and tritium module debris. The room and work areas were decontaminated. Post-cleanup surveys indicated normal background readings. Personnel uptake and dose evaluations are currently being assessed. The tritium sign was an Isolite model 2040 with original activity of 15.0 Curies and was manufactured in March of 1993. Current activity was calculated to be 8.06 Curies. The RSO will follow up with Region 4 concerning personnel tritium uptake and contamination levels as well as equivalent dose calculations. The licensee will be notifying Region 4 Materials branch. |
| ENS 40407 | 22 December 2003 11:40:00 | On 12/18/03 it was determined that two (2) tritium exit signs were missing at Cannon Air Force Base in New Mexico. Contractors were in the process of replacing a number of the signs and two of the signs appearing on the inventory list could not be found. The signs are made by SRB Technology (Sealed Source & Device Registration NC585S103G). The signs were purchased in 1998 with a maximum tritium activity of 25 curies and the current maximum tritium activity is 18 curies. Efforts to locate the signs continue. |
| ENS 40347 | 21 November 2003 14:32:00 | On 11/14/2003, an APD-2000 chemical detector with a 10 millicurie Ni-63 source was discovered to be missing from its storage location. The detector was stored with the Fire Department for Westover Air Reserve Base in Massachusetts. It is not known when the detector was last accounted for through inventory and the ongoing search for the last 7 days has provided no results. The search is continuing and an investigation will be conducted to determine the cause of the loss and potential corrective actions to prevent reoccurrence. Licensee is going to contact NRC Region 4 to report loss. |
| ENS 40096 | 22 August 2003 15:33:00 | During a recent inventory check at MacDill Air Force Base in Florida, six Chemical Agent Monitors (15 milliCuries each) containing Ni-63 were found to be missing. In February 2002, these devices were scheduled to be shipped to Kimhae, Korea. The monitors were submitted to the shipping department at that time. During an inventory check in May 2003, it was determined that these sources could not be found in either Korea or MacDill AFB. The U.S. Air Force is unsure whether the materials were lost after the shipment commenced or whether the materials were even shipped at all. Searches at a MacDill AFB warehouse are scheduled for next week in an attempt to locate these devices. The licensee notified NRC Region IV. |