Objective To assess the overall technical level of personal dose monitoring system of a laboratory through random blind sample comparison of personal doses.
Methods According to the National Comparison Protocol for Personal Dose Monitoring System for Radiation Emission Staff, blind samples of personal external exposure doses were collected from radiation emission workers of a laboratory attending three batches of the yearly blind sample examination organized by the National Institute for Radiological Protection, China Center for Disease Control and Prevention from 2010 to 2012.
Results The relative deviation of the measured values from conventional true values lied within & #177;18% in 2010. Both single unit determination and comprehensive determination lied within & #177;10% in 2011 and 2012. The comparison results were qualified.
Conclusion The overall technical level of personal dose monitoring system in the laboratory meets the requirements of relevent national standards.
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