Abstract: In order to evaluate the radiation level of rare earth tailings, this paper takes thorium-containing tailings after rare earth production from typical monazite beneficiation as research object, and uses Monte Carlo simulation method to calculate the air dose rate around the thorium tailings bucket. The relative standard deviations between the simulated calculation results and the measured data did not exceed 20%, indicating that it is feasible to apply Monte Carlo simulation method to predict the radiation level of rare earth tailings.

Key words: monazite, thorium-containing tailings, γ dose rate, Monte Carlo method