金属及其氧化物掺杂改性二氧化铀燃料的研究进展

Progress in effect of metal oxide doping uranium dioxide fuel

摘要:

随着商用反应堆对长周期、高燃耗需求的日益提升,燃料芯块将面临更加严苛的服役条件。如何进一步提高二氧化铀燃料的物理化学性能指标是开发新型核燃料元件亟待解决的关键技术问题。本文基于对近年来国内外在掺杂燃料芯块研究领域最新研究进展的调研,系统总结并讨论了掺杂元素类型及其对二氧化铀燃料芯块性能指标的影响机理,阐述了掺杂燃料微观组织结构与性能之间的内在联系,指出当前该研究领域仍存在的科学/技术问题以及掺杂二氧化铀的发展趋势,为改善燃料芯块安全性能的设计提供重要的理论参考。

Abstract:

With the increasing demand for long period and high fuel consumption in commercial reactors, fuel pellets would face to more severe service conditions. Further improve the properties of uranium dioxide fuel is the key problem in the development of new nuclear fuel elements. Based on the progress in doped fuel pellets in recent years, this paper systematically discusses the types of doped elements and their influence on the performance of uranium dioxide fuel pellets, expounds the relationship between the microstructure and performance of doped fuel, and points out the existing problems and development trend for doped uranium dioxide fuel. The results would provide valuable references for promoting development of the safety performance of fuel pellets.