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| Entered date | Event description | |
|---|---|---|
| ENS 56051 | 17 August 2022 16:32:00 | The following report was received via email by the Iowa Department of Public Health: A fixed gauge (Isotope Measuring Systems, Inc., Model Number 5221-02, with an Am-241 5 Ci source) was given indications of improper function. When workers entered with the survey meter, they identified radiation levels were elevated, indicating a stuck shutter. The gauge and gauge assembly were rolled into an isolated and secured in a storage facility. Their service provider will be on scene tomorrow (8/18/22) to assess the fixed gauge. Initial cause is a partial closing of the shutter due to a faulty screw. The licensee in pursuing replacement of fixed gauges due to the age of the devices. Iowa Event Number: IA220005 |
| ENS 55984 | 8 July 2022 17:38:00 | The following information was received from the Iowa Department of Public Health (IDPH) via email: At 1515 CDT, July 7, 2022, an NDC Technologies, Model 302 fixed gauge with (approximately) 80 mCi of Kr-85 had a shutter stick open when the line was turned off. The shutter was first identified as stuck open around 1600 when the Radiation Safety Officer was conducting their entrance radiation survey. Radiation safety perimeter was established. The service provider was called and arrived the morning of July 8, 2022. They were able to close the shutter but unable to conduct cause analysis. The gauge will be shipped back to vendor to safely analyze for cause. The IDPH will decide on a reactive inspection based on the cause of stuck shutter identified by the vendor. Licensee aware of 30 day written notification requirement. IA incident no.: IA220004 |
| ENS 55809 | 30 March 2022 15:22:00 | The following information was obtained from the state of Iowa via e-mail: When conducting routine shutter checks on an Ohmart/Vega SHLG-2 fixed gauge, the operator was not able to extend the plunger to move the source into a shielded position (use of hands and basic tools). The device is in a facility that is restricted access and unmanned due to chemical production. Unless manually operated for shutter checks or vessel maintenance, the standard position of this device is open. No increase of radiation levels compared to standard operating conditions. Radiation Safety Officer (RSO) has contacted Vega for corrective action guidance and direct support. Initial guidance is the application of a coil lubricant and rotating the handle. Any action above this will be performed by a Vega service technician. The Licensee has a scheduled shutdown of the production line next week when they will schedule the Vega tech for support. Source/Radioactive Material: SEALED SOURCE GAUGE Manufacturer: OHMART CORP. Model Number: A-2102 IAEA Category: 3 Serial Number: 9849CN Radionuclide: Cs-137 Activity: 4 Ci (148 GBq) Iowa Event Number: IA220002
The following information was received from the state of Iowa via email: Update to Iowa Event No. IA220002 involving a stuck fixed nuclear gauge shutter operating on a low pressure separator on top of a vessel within the low-density production unit. On March 30, 2022, the RSO, under the direction of the manufacturer, removed a small amount of debris, applied Kroil lubricant to the shutter plunger, and was able to successfully close the Vega SHLG-2 gauge shutter. After an additional application of the Kroil lubricant, the gauge shutter operation was back to normal without resistance and no additional actions were necessary. The manufacturer instructed the RSO to apply the Kroil lubricant annually as a preventative measure which the licensee is planning on doing and there are no generic concerns. The 30-day written report was provided to the Iowa Department of Public Health (IDPH) on April 26, 2022. There was no exposure to any individuals to radiation from this event and IDPH considers this to be closed. Notified R3DO (Ziolkowski) |