Abstract: This paper investigates and analyses the situation of nuclear material control in spent fuel reprocessing plants in China, the key technology and experience of accounting and control measures for nuclear materials in commercial spent fuel reprocessing plants abroad, including the setting of material balance area and key measurement points for inventory in typical commercial spent fuel reprocessing plants, the overall design requirements and reality of accounting and control measures for nuclear materials. The concept of real-time accounting, etc. Based on the investigation results and analysis, and in view of the current situation of nuclear material control in China, some preliminary suggestions for the preparation of nuclear material control technology in commercial spent fuel reprocessing plants in China are put forward.

Key words: spent fuel reprocessing, nuclear material accounting and control, online measurement and monitoring