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| Entered date | Event description | |
|---|---|---|
| ENS 45795 | 26 March 2010 14:37:00 | A 5.862 mCi sample of C-14 in a dipropylene glycol propyl ether mix was identified as missing on 2/26/10 during the annual physical inventory of radioactive materials. The sample had been present in its approved storage location during the 2009 physical inventory. The material was lost sometime between March 2009 and February 2010. The licensee has taken the following actions to locate the material: - Spoke with all authorized users to identify location or usage within the last year; - Detailed search of all storage areas and radioisotope-approved labs; and - Checked waste disposal records. 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 This source is not amongst those sources or devices identified by the IAEA Code of Conduct for the Safety & Security of Radioactive Sources to be of concern from a radiological standpoint. Therefore is it being categorized as a less than Category 3 source |
| ENS 44974 | 6 April 2009 16:50:00 | The shutter for an Ohmart SHRM-B strip source containing 12 millicuries of CS-137 failed in the open position. The source is used as a level instrument with the shutter normally open for this application. For the past two weeks the licensee attempted to close the shutter without success. On April 6, 2009 at 0830 the shutter pin broke while employees were attempting to once again close the shutter. There were no personnel radiation exposures during this event. The licensee is devising a method to shield the source and remove it for shipment to a repair facility. |
| ENS 43423 | 14 June 2007 16:20:00 | The licensee was evaluating a fixed gauge in storage for possibly returning it to service when they discovered that the gauge's shutter was stuck open. Temporary lead shielding was installed and the licensee is in the process of contacting the manufacturer in order to have the device repaired and/or the source removed. The device is an Ohmart SHRM L-200, S/N 3269, containing 35 milliCuries of Cs-137. It was removed from service and has been in storage since 1994. The gauge was positioned face down such that radiation surveys did not detect that the shutter was open. The licensee does not believe that any personnel received any significant exposure since the storage area is ground level (no basement) and has limited access (locked). |