Analysis on the results of Ningxia's participating in the national personal dose monitoring ability assessment in 2019

Objective: To understand the operation status of personal dose monitoring system in provincial laboratory by analyzing the assessment results of personal dose monitoring ability of national radiation workers in 2019, to further improve the monitoring ability and level of Ningxia. Methods: The provincial laboratory participated in the National Radiation Workers' personal dose monitoring ability assessment in 2019, and the assessment results were analyzed and summarized. Results: In this comparison, 10 full marks were obtained for the ability assessment results of the test report, and the single group performance deviation was -0.04 ∼ 0.01 (all in line with |Pi| ≤ 0.10), while the comprehensive performance deviation was B² + S² ≤ 0.10 (B was the comprehensive judgment index, S was the comprehensive standard deviation). Therefore, 70 full marks could be obtained for the experiment, and the total score could meet the requirements of 80 points to qualify for participating in the evaluation of excellence. After evaluation, the quality control score was 17.3 points, the Q value was 97.3 (excellent if Q ≥ 95), so the assessment result of individual dose monitoring ability of the laboratory was excellent. Conclusion: The assessment results show that the system of Ningxia individual dose monitoring laboratory operates well, the test result is accurate and the error range is small, which can meet the requirements of relevant national standards for individual dose monitoring of occupational external exposure. (authors)