ENS 48119
ENS Event | |
|---|---|
07:45 Jul 2, 2012 | |
| Title | Unable to Retract Source Into Radiography Camera |
| Event Description | On July 1, 2012 at 11:45 pm, a radiography crew using remote access technology at the Kuparuk Oil Field on the North Slope of Alaska had the jig, collimator and guide tube dislodge and fall while cranking out the source. With the added weight of the connected jig and collimator, the guide tube ended up hanging straight down 30 feet above a platform floor, creating a sharp bend where the guide tube connects to the camera. The crew was not able to retract the source immediately after the accident. Kakivik's onsite Radiation Safety Supervisor and the RSO were immediately notified. The 2 mr/hr boundary was re-surveyed and adjusted. Constant surveillance and control of the boundary was maintained. Per guidance from the Kakivik's emergency procedures and RSO, the exposure device was to be lowered by ropes onto a suitable working surface. During the camera decent, the guide tube came in contact with piping and was straightened sufficiently to allow the source to be safely cranked into the fully
shielded and secured position while still suspended from the ropes. The source was fully shielded within the exposure device by 2:13 am July 2nd. The operation to lower the camera to straighten the guide tube and crank in the source to the fully shielded position took approximately one minute. No exposure to the public or overexposure to Kakivik employees or unauthorized entry into the restricted area was made. All the radiographic equipment was inspected after the accident. The ball connector at the end of the crank drive cable was bent and was replaced. The outside of the guide tube was damaged and taken out of service. The camera including the source pigtail connector was not damaged and was returned to service. After investigation, the cause of the incident was determined to be the improper use of a magnetic jig that was attached to a surface that did not have sufficient force to hold the combined weight of jig, collimator, guide tube and source. The corrective actions taken to prevent recurrence included writing a company policy that clearly states that a radiographer may not use magnetic jigs to support the guide tube and collimator unless it is also supported with ratchet straps or a chain wrench or unless the magnetic jig is being used on a flat steel floor surface. This policy will be required to be read and adhered to by all current and new radiographers. This incident will be reviewed with all the Kakivik radiographers and assistants by the RSO or RSS. There were no injuries as a result of this event and there were no overexposures to members of the public or employees. |
| Where | |
|---|---|
| Kakivik Asset Management Kaparik Oil Field, Alaska (NRC Region 4) | |
| License number: | 50-27667-01 |
| Organization: | Kakivik Asset Management |
| Reporting | |
| 10 CFR 30.50(b)(2), Licensed Material Protection Equipment Failure | |
| Time - Person (Reporting Time:+417.55 h17.398 days <br />2.485 weeks <br />0.572 months <br />) | |
| Opened: | Patton D. Pettijohn 17:18 Jul 19, 2012 |
| NRC Officer: | Donald Norwood |
| Last Updated: | Jul 19, 2012 |
| 48119 - NRC Website | |
Kakivik Asset Management with 10 CFR 30.50(b)(2) | |
WEEKMONTHYEARENS 540502019-05-05T08:18:0005 May 2019 08:18:00
[Table view]10 CFR 30.50(b)(2) Stuck Radiography Camera Source ENS 526912017-04-18T10:30:00018 April 2017 10:30:00 10 CFR 30.50(b)(2) Failure of the Radiography Camera Locking Mechanism ENS 525962017-03-07T05:00:0007 March 2017 05:00:00 10 CFR 30.50(b)(2) Radiography Camera Source Did Not Lock in the Shielded Position When Retracted ENS 515822015-12-01T10:00:0001 December 2015 10:00:00 10 CFR 30.50(b)(2) Radiography Camera Fails to Lock Source Automatically When Retracted ENS 481192012-07-02T07:45:0002 July 2012 07:45:00 10 CFR 30.50(b)(2) Unable to Retract Source Into Radiography Camera ENS 474282011-11-10T20:10:00010 November 2011 20:10:00 10 CFR 30.50(b)(2) Radiography Camera Source Fails to Completely Retract ENS 474182011-11-06T07:00:0006 November 2011 07:00:00 10 CFR 30.50(b)(2) Radiography Camera Source Lock Malfunction ENS 465332011-01-11T08:59:00011 January 2011 08:59:00 10 CFR 30.50(b)(2) Locking Mechanism Malfunction on Radiography Camera ENS 463232010-10-10T00:00:00010 October 2010 00:00:00 10 CFR 30.50(b)(2) Locking Mechanism Malfunction on Radiography Camera ENS 462332010-09-04T08:00:0004 September 2010 08:00:00 10 CFR 30.50(b)(2) Locking Mechanism Malfunction on Radiography Camera ENS 460522010-06-29T09:00:00029 June 2010 09:00:00 10 CFR 30.50(b)(2) Lock Malfunction on a Radiography Camera ENS 460512010-06-29T08:00:00029 June 2010 08:00:00 10 CFR 30.50(b)(2) Source Locking Malfunction of Radiography Camera ENS 456482010-01-22T09:00:00022 January 2010 09:00:00 10 CFR 30.50(b)(2) Failure to Fully Retract the Source of a Radiography Camera ENS 456092010-01-06T10:50:0006 January 2010 10:50:00 10 CFR 30.50(b)(2) Failure to Fully Retract the Source of a Radiography Camera ENS 455442009-12-07T13:30:0007 December 2009 13:30:00 10 CFR 30.50(b)(2) Failure to Fully Retract the Source of a Radiography Camera ENS 455242009-11-27T17:00:00027 November 2009 17:00:00 10 CFR 30.50(b)(2) Failure to Fully Retract the Source of a Radiography Camera ENS 454962009-11-13T00:30:00013 November 2009 00:30:00 10 CFR 30.50(b)(2) Failure to Fully Retract the Source of a Radiography Camera ENS 454692009-10-27T08:45:00027 October 2009 08:45:00 10 CFR 30.50(b)(2) Radiography Source Unable to Fully Retract ENS 453842009-09-27T10:00:00027 September 2009 10:00:00 10 CFR 30.50(b)(2) Radiography Camera Source Fails to Fully Retract Into Camera ENS 437692007-11-03T23:00:0003 November 2007 23:00:00 10 CFR 30.50(b)(2) Radiography Camera Source Fails to Fully Retract Into Camera ENS 431172007-01-13T21:30:00013 January 2007 21:30:00 10 CFR 30.50(b)(2) Failure of Radiography Camera Source to Fully Retract ENS 430672006-12-28T11:30:00028 December 2006 11:30:00 10 CFR 30.50(b)(2) Failure of Radiography Camera Source to Fully Retract ENS 426822006-03-08T08:00:0008 March 2006 08:00:00 10 CFR 30.50(b)(2) Radiography Source Pigtail Disconnected from Drive Cable 2019-05-05T08:18:00 | |