【作者】 高原； 张芳； 李自强； 张凯红； 赵宏生； 刘兵；

【Author】 GAO Yuan;ZHANG Fang;LI Zi-qiang;ZHANG Kai-hong;ZHAO Hong-sheng;LIU Bing;Institute of Nuclear and New Energy Technology,Collaborative Innovation Center of Advanced Nuclear Energy Technology,Tsinghua University;

【机构】 清华大学核能与新能源技术研究院先进核能技术协同创新中心；

【摘要】 高温气冷堆球形燃料元件内的包覆燃料颗粒的合格率对于高温气冷堆的安全运行起着重要作用。致密热解炭层作为包覆燃料颗粒的重要组分之一,其密度是十分重要的性能指标。本文介绍了一种采用梯度密度仪测量包覆燃料颗粒致密热解炭层密度的新方法,简要阐述了梯度密度仪的工作原理,并对新测量方法的不确定度进行了详细分析。结果表明该方法具有较高的测试精度和测试效率,适用于工程应用。更多还原

【Abstract】 The qualification rate of coated fuel particles in spherical fuel elements of high temperature gas cooled reactor plays an important role in the safe operation of high temperature gas cooled reactor.Dense pyrolytic carbon layer is one of the important components for coating fuel particles,and its density is a very important performance index.This paper introduces a new method for measuring the density of dense pyrolytic carbon layers coated with fuel particles using a gradient densitometer,briefly describes the working principle of the gradient densitometer,and analyzes the uncertainty of the new measurement method in detail.The results show that this method has high testing accuracy and efficiency,and is suitable for engineering applications.更多还原