Analysis of the intercomparison results of radiation environment monitoring instruments of Shandong Province in 2017

Objective: To grasp the situations of equipment and calibration practice of the radiation monitoring agencies in the province by organizing an intercomparison practice, and to improve the monitoring level and ability to ensure the reliability of monitoring data. Methods: The quadrant Z-score was used to evaluate the results of ionizing radiation (Gamma dose rate). The results of synthesizing field intensity, electric field and magnetic field of power frequency were evaluated by calculating the relative percentage. Results: 50 out of the 51 measurements of ambient gamma dose rate were acceptable, only one was problematic. Except for a result of power frequency magnetic field with a relative deviation of 30.2%, the deviations of other results were all less than 20%. Conclusion: The intercomparison practice reflects the current level of radiation environment monitoring in the whole province, the monitoring capability of few agencies needs to be improved. (authors)