Abstract: Statistics and analysis of radiation monitoring results using statistical methods are effective quality assurance means to check the reasonableness of data. Monitoring of activity concentrations of natural nuclides in soil was carried out in area A of southern Guangdong, which was randomly selected. The monitoring data were statistically examined using the rank correlation coefficient method. The results showed that the activity concentrations of natural nuclides in soil for this survey belonged to the normal environmental level. Since ²³⁸U ²²⁶Ra and ²¹⁰Po belong to the same uranium family and are in equilibrium in natural soil, the results of the rank correlation coefficient method show that the trend of the monitoring results of ²²⁶Ra and ²¹⁰Po with the monitoring results of ²³⁸U are of great significance, which are in line with the theoretical expectation, and further verified the reasonableness of the monitoring results.

Key words: radiation protection, rank correlation coefficient, natural nuclides, statistical examine