Abstract: According to Testing criteria of personnel dosimetry performance for external exposure (GBZ 207—2016) and the assessment plan, to examine the irradiated blind samples and evaluate the uncertainty, to compare the data before screening the radiation types and radiation levels with the data after screening the radiation types and radiation levels, after correcting the scale factor. The inter-comparison result in 2019 showed that the single group performance deviation of 5 groups was -0.18 to 0.03, and the comprehensive performance deviation was 0.12≤0.30, which was determined as qualified. The inter-comparison results of individual dose monitoring system in 2020 showed that the single group performance deviation of five groups was -0.21 to 0.04, and the comprehensive performance deviation is 0.14≤0.30, which was also judged as qualified. After screening the radiation types and radiation levels, the performance and comprehensive performance of the single group met the requirements of excellent evaluation. The results of the comparison show that, the personal dose monitoring system of our laboratory runs well, and the monitoring technology meets the performance requirements of personal dose monitoring of external exposure.

Key words: individual dose, monitoring ability, comparison, assessment