Overexposure to Radiographer


Print View Posted on: 24 May 2017

Event Date: 15 May 2017 Event Type: Radiation Source
Event Location: United States of America, Wisconsin Rapids, Wisconsin/ACUREN INSPECTION, INC INES Rating: 2 (Final)

During the performance of industrial radiography, the licensee radiographer approached the collimator without his survey meter. The radiographer positioned the collimator in preparation for an exposure shot without first retracting the 3.552 TBq (96 Ci) Se-75 source back inside the camera. Based on the dose assessment from the licensee, the radiographer received an overexposure of 1.76 Sv (176 rem) to each hand. At the time of the reporting of the event, there were no signs of skin reddening on the radiographer’s hands. The U.S. statutory limit for extremity doses is 0.5 Sv (50 rem). The dosimetry badge results revealed a whole body exposure of only 1.52 mSv (152 mrem), which is below the statutory limit of 0.05 Sv (5 rem). NRC EN52759

INES Rating: 2 - Incident (Final) as per 24 May 2017
Release beyond authorized limits? No
Overexposure of a member of the public? No
Overexposure of a worker? Yes

Contamination spread within the facility? No
Damage to radiological barriers (incl. fuel damage) within the facility? No

Degradation of Defence In-Depth No

Person injured physically or casualty? No
Is there a continuing problem? No

Patricia Milligan
Nuclear Regulatory Commission (NRC)

[email protected]
http://www.nrc.gov
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