典型事故容错轻水堆燃料包壳候选材料SiCf/SiC复合材料和Mo合金的研究进展

轻水堆是当前核电站应用最为广泛的堆型,其包壳材料均为锆合金。然而,福岛严重核事故的突发,使锆合金包壳的安全性受到质疑,事故容错燃料及其包壳候选材料被提上研究议程。本文综述了轻水堆用SiC_f/SiC复合材料和Mo合金包壳候选材料的研究进展,以及它们在轻水堆工况下的性能评估,指出实际工程应用所面临的挑战。最后展望了SiC_f/SiC复合材料和Mo合金在核燃料包壳中的应用前景。

SiCf/SiC Composites and Molybdenum Alloys:the Promising Candidate Materialsfor Typical Accident Tolerant Fuel Cladding of Light Water Reactors

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 SiC_f/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.