Radiation Level Monitoring and Evaluation of Main Rivers in Yunnan Province from 2018 to 2022

From 2018 to 2022,six monitoring sections were set up in the main rivers of Yunnan Province to quantitatively analyze the total U,total Th,²²⁶Ra,and total α Radioactivity,total β Radioactivity,⁹⁰Sr,¹³⁷Cs activity concentrations.The results indicated that from 2018 to 2022,total U,total Th,²²⁶Ra,total α Radioactivity,total β,⁹⁰Sr,and ¹³⁷Cs remained within the normal fluctuation range and maintained stable during the 5-year period without any abnormal increase.