Abstract: The China Experimental Fast Reactor(CEFR) is the first sodium cold fast neutron reactor in China, which has achieved full-power operation. The source, migration in the reactor core and release pathways of the airborne radioactive materials in the experimental fast reactor of China were analyzed. The pathways discharged to the environment in normal and accident conditions were identified in order to assess the radioactive effects of the CEFR on the environment, and to establish and maintain the protection against radioactive hazards.

Key words: Chinese Experimental Fast Reactor, radioactive material release, ventilation, excessive radioactive material released