To manage climate challenge and optimize energy supply structure, China has decided to develop more nuclear power in a safe and high-efficiency manner. On a nuclear sustainable development perspective, it is necessary to develop a closed fuel cycle (CFC) system and also take great efforts to improve natural uranium (NU) utilization ratio of thermal reactor. CANDU is great certainty to play an important role in this strategy. This paper presents CNNC Third Qinshan Nuclear Power Company Limited (TQNPC) efforts of being develop the engineering technologies of recycling reprocessed uranium (RU) and nuclear use of thorium (Th) resource in CANDU type reactor and finding the CANDU’s position in Chinese CFC system. Also this paper provides a proposal of implementation plan for Chinese CFC system development and also for application of the related CANDU engineering technologies.

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