ENS 48954
ENS Event | |
|---|---|
07:00 Apr 20, 2013 | |
| Title | Agreement State Report - Radiography Source Stuck in Guide Tube |
| Event Description | The following was received from the State of Washington via email:
Mistras Group, Inc. was conducting industrial radiographic operations at Shell Puget Sound Refinery. After a routine exposure, the radiographer attempted to crank the source back into the camera, but the source became stuck. The source could not make it past a crimp in the guide tube, which was caused earlier when the camera fell on it. The radiography crew moved their restricted area boundaries to increase the size of the restricted area and to provide additional protection to anyone in the area. Fortunately, nobody other than the radiography crew were in that portion of the refinery. The radiography crew and assistant radiation safety officer were able to manually pull the source back into the shielded position in the camera. The highest exposure to any person, as read from a pocket dosimeter, was 10 millirem. Note: This is a preliminary report - we [State of Washington] will obtain additional information from the licensee and provide a more complete report in the near future. Washington Item Number: WA130001
The following information was received via fax: An industrial radiography crew retracted the source, checked to verify that the source was fully retracted and locked, and discovered that it was not. The crew made more attempts to retract the source, but were unsuccessful. They attempted to straighten out the crank assembly, then the radiographic exposure device fell about 46 inches from a pipe onto a platform, after which the drive cable would not move using the crank handle. The restricted area was expanded to the 2 mR/hr line and facility management and the licensee's radiation safety personnel were notified and traveled to the site. The guide tube was moved onto the platform and lead shot bags were placed onto the collimator to provide extra shielding. Licensee radiation safety staff found that the drive cable was hung up in the crank assembly conduit but moved freely in the source tube. So, the staff manually pulled on the drive cable and returned the source to the fully retracted and locked position in the radiographic exposure device. It was discovered that there was a crimp in the crank assembly conduit that kept the drive cable from moving. The highest pocket dosimeter reading was 18 millirem. The radiographic exposure device was sent to the manufacturer for evaluation. Notified the R4DO (Haire) and FSME Event Resources (via e-mail). |
| Where | |
|---|---|
| Mistras Group, Inc Kent, Washington (NRC Region 4) | |
| License number: | WN-IR011-1 |
| Organization: | Wa Division Of Radiation Protection |
| Reporting | |
| Agreement State | |
| Time - Person (Reporting Time:+60.3 h2.513 days <br />0.359 weeks <br />0.0826 months <br />) | |
| Opened: | James Killingbeck 19:18 Apr 22, 2013 |
| NRC Officer: | Charles Teal |
| Last Updated: | Apr 29, 2013 |
| 48954 - NRC Website | |
Mistras Group, Inc with Agreement State | |
WEEKMONTHYEARENS 534922018-05-10T05:00:00010 May 2018 05:00:00
[Table view]Agreement State Louisiana Agreement State Report - Potential Overexposure ENS 511402015-06-08T12:00:0008 June 2015 12:00:00 Agreement State Agreement State Report - Unattended Radiography Camera ENS 489542013-04-20T07:00:00020 April 2013 07:00:00 Agreement State Agreement State Report - Radiography Source Stuck in Guide Tube ENS 467852011-04-20T23:00:00020 April 2011 23:00:00 Agreement State Agreement State Report - Radiography Source Disconnected from Camera ENS 461322010-07-23T15:20:00023 July 2010 15:20:00 Agreement State Agreement State Report - Potential Whole Body Dose Above Regulatory Limits 2018-05-10T05:00:00 | |