Abstract: Sampling uncertainty is one of an important part of the uncertainty in radiation environmental monitoring results. Because of the difficulty of quantifying sampling uncertainty, at present, the uncertainty of monitoring results of radiation environment only includes the analysis process, without considering the sampling process. Sampling design using SAX method and data analysis using robust variance analysis method can quantify the uncertainty of sampling process. A batch of actual monitoring data are analyzed by the SAX method, and the sampling uncertainty is obtained. And the uncertainty of monitoring results is studied carefully. It is considered that SAX method can be used to guide the monitoring of radiation environment, so as to optimize the monitoring strategy and to improve the monitoring quality.

Key words: SAX method, sampling, uncertainty