Abstract: The results for gamma nuclides in aerosol in State Environmental Radiation Monitoring Network Measurement Assessment Program in 2013, held by the Environmental Radiation Monitoring Station of Zhejiang Province, were presented. With robust statistical method employed, it showed that 87.8% of measurement results were satisfied, 6.1% were dubitable, and remaining 6.1% dissatisfied. Comparison of the resulted median and the reference values indicated there may be a negative system error for the measurements of every nuclide. With this program, the measurement capability of gamma nuclides in aerosol in the network was generally understood, which provided a basis for the future quality assurance in the respect.

Key words: Radiation environmental monitoring, Aerosol, Gamma nuclide