INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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Analysis of the Synthesis Process for Uranium Nitride Powder |
SUN Yongju1,2, CHEN Jianwei1, MEI Huaping1, LIU Jing1, LI Taosheng1, WU Qingsheng1
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1 Key Laboratory of Neutronics and Radiation Safety, Institute of Nuclear Energy Safety Technology, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei 230031, China 2 University of Science and Technology of China, Hefei 230027, China |
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Abstract With the characteristics of high density of uranium atoms, good thermal conductivity, radiation resistance and good compatibility with liquid metal coolants, uranium nitride (UN, Uranium mono-nitride) has been chosen as a candidate for small modular reactor and the accident-tolerant fuel. The performance of UN fuel varies with the synthesis process, which in turn affects its performance in reactors. Compared with oxide nuclear fuel, the synthesis of uranium nitride fuel is complicated and the chemical property is lively, that's why it is so difficult to manufacture and preserve. In this paper, the principles, research status, advantages and disadvantages of 4 uranium nitride synthesis processes such as carbothermal reduction nitridation, metal nitridation, uranium fluoride ammonium nitridation and sol-gel chemistry are summarized and analyzed to propose the development trend of UN synthesis processes.
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Published: 03 November 2021
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Fund:National Basic Research Program of China (2018YFB1900601), the “Strategic Priority Research Program| of the Chinese Academy of Sciences (XDA22010504), Key Deployment Project of the Chinese Academy of Sciences (ZDRW-KT-2019-1-0202). |
About author:: Yongju Sun, Ph.D. candidate, chemical process engineer. In 2012, she received her master's degree from Tianjin University. Won the third prize of Maanshan Science and Technology Progress, and successively participated in "Innovation and Entrepreneurship Competition" and "Innovation and Entrepreneurship in China" and won the first prize respectively. As the chief draftsman to participate in the drafting and defense evaluation of an industry standard. She published 4 academic papers in domestic and foreign journals in related professional fields, applied for and authorized 3 patents. Jianwei Chen, received bachelor degree of material science and engineering from Shandong University in 2006,and obtained his Ph.D. degree of material science and engineering from Chongqing University in 2012. Dr. Chen's research interests include R&D of key materials for fuel assembly in lead-based cooled reactor, assessment and microstructure analysis of the cladding tubes. He has published about 20 papers in related fields and submitted 10 patents. |
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