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| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 47324 | 4 October 2011 05:00:00 | Agreement State | Agreement State Report - Stuck Open Shutter on Process Gauge | The following report was received from the Kansas Department of Health and Environment via facsimile: The licensee attempted to close the shutter (on a process gauge) in preparation for a job. The shutter would not close. There were no personnel exposures (associated with this event). Because of the location (of the gauge), there are no likely exposures due to this failure. The source is located approximately 12 feet above the ground on a tank. Access is by portable ladder. Operations and maintenance personnel were notified. The shutter in question is on an Ohmart/VEGA model SHF1 B-45 source holder (S/N 7294CN) containing 100 milli-Curies of Cs-137 in a sealed source. The manufacturer, (Ohmart) VEGA, has been contacted and is working to schedule their service technician to (make repairs). Sealed Source and Device Registry OH-0522-D-01 02-B states 'Commonly reported device failures associated with this device series includes stuck shutters, shutter handles breaking off, and broken screws. A review of these failures indicate common root cause issues are associated with: operating the devices outside the normal conditions of use; failure to seek appropriate device service when shutters start becoming difficult to operate; shutter binding due to environmental contaminant intrusion into the shutter; and, forcing operation of shutter instead of seeking corrective action. The most commonly involved series is the SH-F2 which is the model typically installed in harsh environmental conditions'. Kansas Report Number: KS110011 |