(1. China Nuclear Power Technology Research Institute, Shenzhen 518026, China) (2. HighSafety ATF Engineering Laboratory of Shenzhen, Shenzhen 518026, China)
Accident tolerant fuel (ATF) is an advanced nuclear fuel concept proposed after the Fukushima nuclear accident in Japan which is mainly to improve the accident tolerance performance of reactors under accident conditions and fundamentally improve the ability of nuclear power plants to resist serious accidents, so as to effectively improve the safety and economy of nuclear power. For zirconium alloy cladding materials, improving the high temperature oxidation resistance by coating is the main direction under concept of accident tolerant fuel. In order to fully understand the technical development status and trend of zirconium alloy cladding, the international and domestic patent applications are statistically analyzed. In addition, the development trend of coated zirconium alloy cladding technology branch since 1960s is analyzed. In addition, according to the research and development status of zirconium alloy coating cladding in China, the suggestions on the research and development of zirconium alloy coating cladding are put forward from the aspects of research and development progress and technology focus.