Abstract: Light water reactor (LWR) is the most widespreadly used type of nuclear power reactor, all of which are equipped with fuel claddings made of zirconium alloy. However, the Fukushima Daiichi accident has called into question the reliability of the in-service Zr alloy claddings, and thereby various international programs have been launched to develop accident tolerant fuel (ATF) and relevant candidate cladding materials. This paper summarizes the recent research progress of SiCf/SiC composites and Mo alloys cladding materials, along with the performance assessment with respect to LWR working conditions. In addition, the potential challenges for engineering practices and the future prospects are also discussed.
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2018, Vol. 32 
