事故容错燃料Cr涂层锆合金包壳研究进展

Research progress on Cr-coated zirconium alloy cladding of accident tolerant fuel

摘要:

事故容错燃料可进一步提高商用核反应堆的安全性和经济性。目前，Cr涂层改进锆合金包壳是短期内能实现工业化应用的事故容错燃料包壳最佳方案。本文综述Cr涂层锆合金包壳的研究进展，从Cr涂层锆合金包壳的发展现状、制备工艺及其显微组织与服役性能三方面展开。首先介绍了Cr涂层在国内外的发展概况。其次阐述了Cr涂层的主要制备工艺，包括冷喷涂、激光熔覆与物理气相沉积等，并分析不同工艺特点与显微组织。然后总结了Cr涂层锆合金包壳的腐蚀性能、辐照性能以及力学性能研究结果，对腐蚀氧化机理、辐照损伤机制与塑性变形机制进行了深入剖析。最后对当前研究中存在的问题以及未来的发展方向进行了分析和展望。

Abstract:

Accident tolerant fuel can further improve the safety and economics of commercial nuclear reactors. At present, Cr coating improved zirconium alloy cladding is the best solution for accident tolerant fuel cladding that can achieve industrial application in the short term. This paper reviews the research progress of Cr-coated zirconium alloy cladding, starting from the development status, preparation process, microstructure and service performance of Cr-coated zirconium alloy cladding. Firstly, the development of Cr coating at home and abroad is introduced. Secondly, the main preparation processes of Cr coatings, including cold spraying, laser cladding and physical vapor deposition, were described, and the characteristics and microstructure of different processes were analyzed. Then, the corrosion properties, irradiation properties and mechanical properties of Cr-coated zirconium alloy cladding are summarized, and the corrosion oxidation mechanism, irradiation damage mechanism and plastic deformation mechanism are deeply analyzed. Finally, the problems existing in the current research and the future development direction are analyzed and prospected.