Overexposure to Radiographer


Print View Posted on: 03 November 2011

Event Date: 28 October 2011 Event Type: Radiation Source
Event Location: United States of America, Wyalusing, Pennsylvania INES Rating: 2 (Final)

The licensee radiography crew believed they had retracted the source back into the body of the radiography camera. They then approached the pipe. One radiographer noticed that an indicator on the camera suggested the source was actually not fully retracted into the body of the camera. The radiographers’ survey meters registered a zero reading; however, one radiographer’s digital rate meter was alarming. One of the radiographers turned one crank on the camera, and that is when the source became fully retracted. After observing their pocket self-reading dosimeters, they realized the dosimeters were off-scale. The licensee sent their dosimetry badges for emergency processing. One of the badges recorded a whole body dose of 51 mSv (5.1 rem), which exceeds the statutory limit of 50 mSv (5 rem).

INES Rating: 2 - Incident (Final) as per 02 November 2011
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

Dr. Cynthia Jones
Nuclear Regulatory Commission (NRC)

Cynthia.Jones@nrc.gov
http://www.nrc.gov
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