Analysis on Personal Radiation Exposure Monitoring Results in Medical Radiation Workers in Huai'an from 2012 to 2014

Objective To measure personal radiation exposure dose and its distribution among medical radiation workers in Huai'an, and to provide a basis for radiation protection management.

Methods According to the requirements of the Specifcations of Individual Monitoring for Occupational External Exposure(GBZ 128-2002), the personal radiation exposure dose of medical radiation workers was monitored using thermo luminescence dose method in departments of diagnostic radiology, interventional radiology, nuclear medicine, and radiation therapy. The monitoring results from 2012 to 2014 were retrieved from the occupational health management system for radiation workers to analyze personal dose distribution characteristics.

Results Of the 2 540 radiation workers monitored from 2012 to 2014, the annual average effective dose was 0.62 mSv, and the value for the selected three years was 0.39, 0.64, and 0.76 mSv, respectively. All monitored radiation workers' annual effective doses were lower than 20 mSv, in which 99.96% reported less than 5 mSv. The radiation workers in diagnostic radiology(0.64 mSv) or interventional radiology(0.55 mSv) reported greater average annual effective dose than others.

Conclusion The annual effective radiation exposure dose of medical radiation workers in Huai'an is lower than the national limit, indicating safe working conditions and environment during the monitored period. However, the increasing average annual effective dose suggests the need of strengthened supervision and management of radiation health.