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| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 46291 | 29 September 2010 11:50:00 | Agreement State | Agreement State Report - Source Housing on Densitometer Detached from Equipment | The following information was sent from the commonwealth via fax: Excessive equipment vibration while the licensee was working at a job site caused the source housing of the Berthold LB8010 densitometer (Ser. No. 10049) to dislodge itself from the base plate, and detach from the equipment it was mounted to. The source housing was not damaged, the shutter is fully functional, and current survey readings similarly match past surveys; approximately 200 microroentgen per hour (uR/h) being the highest reading at 1 meter, with the shutter was closed and beam pointed toward the ground. The SS&D sheet on this densitometer notes a (maximum) 50 milliCuries (mCi) of Cs-137 source. Exact current activity on this unit to be determined. CAUSE OF THE EVENT: Excessive vibration during use, and (perhaps) a design problem with how the source housing is bolted to a mounting plate. ACTIONS: To prevent this from happening in the future, the clamps will be switched out on all the licensee's inline densitometers. In the meantime, the device is being sent back to Berthold to be remounted using a new version clamp. They will try to send whatever they can of the old clamp that failed to Berthold so it can be inspected. PaDEP/BRP (state) will be performing an inspection of the device and equipment, as well as interviewing those involved with the source housing recovery for additional details. The licensee will also be providing a full report with their findings and corrective actions. PA Event Report No: PA100023 |