关键词: 钇-90树脂微球, 放射防护, 控制效果评价

Abstract: Objective To evaluate the effectiveness of radiation protection and control for the occupational hazards of the ⁹⁰Y resin microsphere treatment project in the China Institute of Atomic Energy Hospital,providing technical basis for the completion acceptance and officially operation of the project,and reference for other medical institutions building similar projects. Methods From March to April 2023,the on-site investigation method,checklist analysis method and comprehensive analysis method were used to analyze radiation source items,workplace zoning and grading,radiation protection detection,surface contamination detection and radiation protection evaluation of the project. Results After the project was put into operation,the total daily equivalent maximum operation volume of the nuclear medicine department site was about 1.01×10⁸ Bq. The radiation dose rate and β surface contamination level of the surrounding environment of the site were higher for ⁹⁰Y drug dispensing process,the maximum X-γ dose equivalent rate at 5 cm on the surface of the fume hood was 8.79 μSv/h,and the maximum β surface pollution was 0.22 Bq/cm²,which met the requirements of nuclear medicine radiation protection. Conclusions The measures adopted in this project all meet the requirements of national standards,the radiation protection control effect is qualified,and the conditions for the completion and acceptance of radiation protection facilities are met. The project uses radioactive nuclides ⁹⁰Y、⁹⁹Tc^m for treatment,which belongs to the construction project category of radioactive hazard and serious diagnostic and treatment risk. The hospital should attach importance to the radiation protection of this project and ensure the radiation safety and health of radiation workers and the public.

Key words: ⁹⁰Y resin microspheres, Radiation protection, Control effectiveness evaluation