Source Analysis and Control of ¹³¹I Aerosol in Quality Control Laboratory

Due to the volatility of iodine, it is easy to cause internal radiation hazards to personnel engaged in the production and quality inspection of ¹³¹I radioactive drugs. Taking the quality inspection process as an example, the source and volatilization of ¹³¹I aerosol are determined by analyzing and comparing the measured values of radioactive instruments with the theoretical values of decay, and the control measures that can be taken are studied. It is found that the largest sources of ¹³¹I aerosol in the quality control laboratory are the capillary tube and pipette suction head in radioactive waste, and the activity of ¹³¹I aerosol volatilized in a unit time can reach 1.93×10⁵ Bq/h. The concentration of ¹³¹I aerosol can be significantly reduced after the measures of sealing radioactive waste are adopted. The research results have practical significance for properly handling the radioactive waste generated in the quality inspection process, reducing the concentration of ¹³¹I aerosol in the quality control laboratory, and protecting the health and safety of quality control staff.