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| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 53900 | 14 February 2019 06:00:00 | Agreement State | Agreement State Report - Unplanned Contamination from Oil Field Equipment | The following was received via email from the state of Texas: On February 27, 2019, the Agency (Texas Department of State Health Services) confirmed that access to an oil field equipment wash building had been restricted since February 14, 2019, due to radioactive material contamination. On February 11, 2019, a load of waste from the licensee's facility had set off the radiation alarm at the landfill. The isotope was identified as antimony-124. The load was returned to the licensee's facility later that afternoon. On February 12, 2019, the licensee began surveying and investigating, starting with the dumpster and expanding to other areas. The contamination was found to be on piece/part of a fracking pump. On February 13, 2019, contamination was identified on a fracking pump trailer. On February 14, 2019, surveys identified contamination in the trench of one of the bays in the equipment wash building. Access to the building was restricted that day and is still restricted. The licensee's initial sampling from the trench identified antimony-124 and scandium-46. They are waiting on analyses of a second sampling of the trench sludge after water was removed/collected, and they will be sampling the traps/separators between the trench and the sanitary sewer system. The licensee is not licensed for, nor did it use, these tracer materials. Their equipment was being used on a well site at which another licensee had performed a tracer study while the equipment was in use. The tracer study licensee has been involved in some of the surveying and with the collection of contaminated equipment items they took possession of to be held or disposed in accordance with their license. An investigation into this event is ongoing. More information will be provided as it is obtained in accordance with SA-300. Texas Incident #: I-9656 | ||
| ENS 41974 | 29 August 2005 05:00:00 | 10 CFR 20.2201(a)(1)(i) | Tritium Sources on Gulf Oil Platform Lost Due to Hurricane Katrina | The Radiation Safety Officer for Schlumberger Technology Corporation reported that two Tritium Neutron Pulse Generators (Schlumberger Model 7158) with 1.6 Curie tritium sources (total of 3.2 Curies) were lost from an oil platform (Oil Platform Ensco-29) in the Gulf of Mexico. The platform was severely damaged and most equipment lost due to Hurricane Katrina storm damage. The licensee has reported this item to Region 4. This is less than the quantity of an IAEA Category 3 source. 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. For some of these sources, such as moisture density gauges or thickness gauges that are IAEA 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. | ||
| ENS 40445 | 11 January 2004 02:00:00 | Agreement State | Agreement State Report Involving Personnel Radiation Exposure | On 01/12/04, the State of California received a report from Schlumberger Technology of an incident that occurred about 1800 PST on 01/10/04. A 1.3 curie Cs-137 source fell off of its tool. A rig hand picked up the source with his fingertips thinking it was the base of a lightbulb. A Schlumberger crew member told the worker to leave it on the deck. The source was recovered with the source handling tool, and returned it to the shielded container. Touching exposure was estimated to be 20 mrem with calculations based on maximum touching time of 10 seconds. Whole body exposure was estimated to be 2.9 mrem with calculation exposure based on beginning at 6 feet from the source and closest distance at 2.5 feet for maximum of 2 minutes. The source has exposure characteristics of 2 mrem/hr at 200 inches (min) from shielded (dovetail) end, and 2 mrem/hr at 680 inches (max) from the non-shielded end. |