ENS 49636
ENS Event | |
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08:00 Dec 14, 2013 | |
Title | Agreement State Report - Stuck Radiography Source |
Event Description | The following was received via facsimile:
Event Narrative: While performing radiography operations at Microsoft Bld. 32 in Redmond, Washington, the radiography source could not be retracted from the collimator back into camera. The Radiation Safety Officer (RSO) of Mistras then called the Washington State Department of Health (DOH) emergency line (206 Nuclear) and an inspector was dispatched to the scene. At the scene was the RSO, Assistant RSO (trained in source recovery), assistant radiographer, and another radiographer. Assistance was being provided via telephone by QSA Global. It is not known yet if previous attempts brought the source through the camera and into the crank cable tube. However, while attempting to remedy the situation the (0-200 mR) pocket dosimeter of the radiographer had gone off scale. The radiographer was removed from the scene and his TLD has been sent in via overnight mail for emergency processing. The collimator was attached to the camera with a 2-3 inch long fitting (there was no guide tube). After disconnecting the crank cable from the camera, the crank cable was pulled back to the crank (while observing survey meters), and it was discovered that the connector at the end of the cable where it was attached to the pig tail was broken. The camera and collimator were loaded onto a dry wall cart and covered with several bags of lead shot. A moving 2 mR/hr barrier was established around the cart during this movement. The apparatus was then moved to a remote area of the parking lot. Once in the parking lot, 2 mR/hr barricades were set up. Eight foot long tools were made in order to unscrew the fitting from the collimator. Once the fitting was removed, the connector end of the pigtail was exposed and could be pulled out (with eight foot grappler) of the collimator and inserted into another camera. This procedure was practiced several times with a dummy source prior to the actual transfer. The highest dose received on the retrieval team was 93 mR. An investigation is about to begin, and Mistras was performing reenactments earlier today. More information pending.
The retrieval team leader received 43 mR with pocket dosimeter, the licensee RSO received 93 mR with pocket dosimeter, the assistant radiographer received 85 mR with pocket dosimeter, and the radiographer received 40 mR with pocket dosimeter. Notified R4DO (Lantz) and FSME Events Resource via email.
The following information was received via e-mail: This incident has been closed as of May 29, 2014. The two sides of the crankshaft fractures were analyzed to determine the nature of the fracture mechanism. A reenactment was performed at the licensees facility. Radiographers were re-trained with respect to not attempting retrieval procedures without training or contacting the RSO, and supervision of assistants has been adequately addressed by the licensee. Details of any of these issues are available upon request. Washington Incident #WA-13-062 Notified the R4DO (Vasquez) and FSME Resources (via e-mail). |
Where | |
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Mistras Group, Inc. Redmond, Washington (NRC Region 4) | |
License number: | WN-IR011-1 |
Organization: | Wa Division Of Radiation Protection |
Reporting | |
Agreement State | |
Time - Person (Reporting Time:+60.03 h2.501 days <br />0.357 weeks <br />0.0822 months <br />) | |
Opened: | Stephen Matthews 20:02 Dec 16, 2013 |
NRC Officer: | Daniel Mills |
Last Updated: | May 29, 2014 |
49636 - NRC Website
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Martinez Refining Company with Agreement State | |
WEEKMONTHYEARENS 571702024-06-04T17:34:0004 June 2024 17:34:00
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