ENS 44145

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v t e ENS Event
05:00 Apr 17, 2008
Title	Radiography Camera Malfunction
Event Description	This "incident occurred on April 15, 2008 at about 8:20 PM at a new [non-nuclear] power plant under construction. Team Industrial Services was performing industrial radiography on Unit 1. The radiography was being performed on elevation 807 on a header approximately 4 foot off of the roof of the boiler. According to statements from the crew, they had exposed the source on their first shot of the pipe weld, and approximately 15 seconds into the shot they heard what they thought was the guide tube and collimator faillng off the pipe to the roof of the boiler. They then went to retract the source back into the exposure device and encountered an obstruction preventing the source from being retracted into a secured position in the exposure device. They attempted [to retract the source] three times with no success. The industrial radiographer contacted the facility radiation safety officer and advised him that he had a source he could not retract back into the exposure device. The industrial radiographer extended the radiation safety boundaries above and below the area. The Radiation Safety Officer (RSO) advised [the radiographer] that he was on his way to the site. The RSO arrived at the site at approximately 9:00 PM. At this time an initial assessment was made and a decision was made to bring in two more trained technicians to assist with boundary control and retrieval of the sealed source. After arrival of the extra technicians, a plan for retrieval was discussed with all technicians, including the Corporate Radiation Safety Officer. The industrial radiographer stated that his pocket dosimeter had gone 'off scale.' This means that he could have received a dose of at least 200 millirems of radiation. At this time he was advised that he would not be assisting with the retrieval but he continued to assist with boundary control. The licensee has estimated that the industrial radiographer received 630 mR. At approximately 11:35 PM, the shielding of the source and attempt to repair the guide tube commenced. Four lead shot bags were placed over the end of the guide tube where the sealed source was known to be. The radiation levels were reduced to 15 millirems per hour at five feet from the source under the lead shot bags. The RSO then approached the guide tube with a pair of pliers, located the distortion in the guide tube and rounded it with the pliers. He then returned to the crank assembly and retracted the source successfully back into the exposure device. The RSO is estimated to have received 32 mR from conducting the repair. A determination was made that there was not an equipment failure, it was a result of the guide tube falling from the pipe to the roof of the boiler that damaged the guide tube resulting in the obstruction. Boundaries were maintained throughout the incident to ensure that at no time any member of the general public could enter the incident area. DHFS plans to investigate this incident on the next inspection (to be conducted in the near future).

ENS 44145 +/-
Where
Team Industrial Services Milwaukee, Wisconsin (NRC Region 3)
License number:	079-2005-01
Organization:	Wisconsin Radiation Protection
Reporting

Agreement State
Time - Person (Reporting Time:+12.45 h0.519 days <br />0.0741 weeks <br />0.0171 months <br />)
Opened:	Cheryl K. Rogers 17:27 Apr 17, 2008
NRC Officer:	Pete Snyder
Last Updated:	Apr 17, 2008
44145 - NRC Website
v • d • e

v t e Emergency Notification System
Team Industrial Services with Agreement State
WEEKMONTHYEAR2016-11-03T04:00:00 [Table view]
[ENS list for Team Industrial Services]

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