Synchrotron radiation-based materials characterization techniques shed light on molten salt reactor alloys

作     者：Li Jiang Xiang-Xi Ye De-Jun Wang Zhi-Jun Li Li Jiang;Xiang-Xi Ye;De-Jun Wang;Zhi-Jun Li

作者机构：Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201800China Ministry of Ecology and EnvironmentBeijing 100135China 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2020年第31卷第1期

页      面：57-71页

核心收录：

学科分类：082703[工学-核技术及应用] 08[工学] 0807[工学-动力工程及工程热物理] 0827[工学-核科学与技术] 0703[理学-化学] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the National key research and development program of China(Nos.2016YFB0700401 and 2016YFB0700404) Natural Science Foundation of Shanghai(Nos.19ZR1468200 and 18ZR1448000) National Natural Science Foundation of China(Nos.51671154,51601213 and 51671122) Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA02004210) Youth Innovation Promotion Association,Chinese Academy of Science(No.2019264) 

主　　题：Molten salt reactor Alloy materials Synchrotron radiation Shanghai Synchrotron Radiation Facility Molten salt corrosion Tellurium corrosion 

摘      要：From a safety point of view, it is important to study the damages and reliability of molten salt reactor structural alloy materials, which are subjected to extreme environments due to neutron irradiation, molten salt corrosion, fission product attacks, thermal stress, and even combinations of these. In the past few years, synchrotron radiation-based materials characterization techniques have proven to be effective in revealing the microstructural evolution and failure mechanisms of the alloys under surrogating operation conditions. Here, we review the recent progress in the investigations of molten salt corrosion,tellurium(Te) corrosion, and alloy design. The valence states and distribution of chromium(Cr) atoms, and the diffusion and local atomic structure of Te atoms near the surface of corroded alloys have been investigated using synchrotron radiation techniques, which considerably deepen the understandings on the molten salt and Te corrosion behaviors. Furthermore, the structure and size distribution of the second phases in the alloys have been obtained, which are helpful for the future development of new alloy materials.