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| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 56728 | 9 August 2023 05:00:00 | Agreement State | Lost Tritium Exit Signs | The following was received from the Texas Department of State Health Services (the Department) via phone and email: On August 10, 2023, the Department was notified by the licensee that during the August 9, 2023, inventory of the ExxonMobil (EM) Beaumont Polyethylene Plant (BPEP) Tritium (H-3) exit signs, 9 uninstalled signs previously stored in the (instrumentation and electrical) shop could not be located. After an investigation and questioning of the personnel with access to the signs it was determined the box of tritium exit signs was placed in the trash dumpster during cleanup of the (instrumentation and electrical) shop area. As of August 14, 2023, the signs are considered missing/lost. The general licensee stated there is no evidence the integrity of the signs was compromised during the cleanup and thus there was no radiation exposure to personnel. All other unused exit signs were moved to a secured storage location. The Department has requested additional information from the general licensee. The investigation into this event is ongoing. Additional information will be provided as it is received in accordance with SA-300. The signs contained a total of 234.9 Ci, H-3 when manufactured in 2016. Texas Incident Number: 10047 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 | ||
| ENS 52238 | 13 September 2016 14:10:00 | Agreement State | Agreement State Report - Density Gauge Equipment Malfunction | The following was received from the State of Louisiana via email: On September 13, 2016, at approximately 0910, Central Standard Time, Radiation Safety Officer (RSO) of ExxonMobil notified LDEQ (Louisiana Department of Environmental Quality) of a potential equipment malfunction. A Ronan Model SA-1-C5 level/density gauge, device serial number LA8122A, containing a 100 mCi sealed source of Cs-137 and installed on D-Line Low Pressure Separator Vessel, V-231, was undergoing a routine annual shutter test when the gauge shutter became stuck in the open position. The RSO called Ronan and left the manufacturer a message requesting service and repair of the gauge. This is not an emergency. ExxonMobil Radiation Safety Office staff are monitoring the vessel condition and have the situation under control. There is no potential for off-site exposure. Event Report ID NO.: LA160009 | ||
| ENS 52016 | 16 June 2016 05:00:00 | Agreement State | Agreement State Report - Two Sources Stuck in Dip Tubes During Annual Shutter Test | The following information was received from the State of Louisiana via fax: On June 16, 2016, at approximately 1500 CDT, (the) Radiation Safety Officer of ExxonMobil notified LDEQ (Louisiana Department of Environmental Quality) of a potential equipment malfunction. A custom built Berthold level/density gauge installed on G-Line Reactor Vessel, V5300 and possessing seven 10 mCi Co-60 sealed sources, was undergoing a routine annual shutter test in which the sealed sources were pulled upwards in their dip tubes via connecting cables to the top of the source holder. The sources in dip tubes #2 and #6 became stuck in the dip tubes and could not be pulled upward further. The other sources were pulled up to the top of the source holder successfully. All sources were successfully returned to their normal operating positions. (The RSO) called Berthold contract service engineer (at) Radcon, LLC and discussed the potential malfunction. (The service engineer) stated that differential thermal expansion between the source capsules and dip tubes under heating within the reactor vessel likely caused the sources to begin sticking as they were being pulled upward in their dip tubes. The licensee placed another service call to (the service engineer) on June 17, 2016, but was unable to contact him, but left a message. Radcon, LLC will conduct a maintenance inspection and repair of the gauge which is tentatively planned for July 11, 2016. This is not an emergency situation. ExxonMobil Radiation Safety Office staff are monitoring the vessel condition and have the situation under control. There is no potential for off-site exposure. Event Report ID No.: LA160007 |