压水堆乏燃料元件包壳表面氧化膜厚度测量技术研究  

Research on Measurement Technique of Oxide Film Thickness on Surface of Spent Fuel Element in PWR

作　　者：罗曼 LUO Man(China Institute of Atomic Energy,Beijing,102413 China)

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《科技资讯》2021年第9期63-65,70,共4页Science & Technology Information

摘　　要：在压水堆中,核燃料元件长期受高温、高压、高辐照等环境影响,其外包壳表面会形成黑色致密氧化膜。氧化膜会降低燃料元件的热交换能力,使燃料性能恶化,影响反应堆安全运行。为完成秦山一期燃料元件辐照后检验工作,首次在国内热室中,运用涡流方法对乏燃料元件进行了全尺寸氧化膜厚度测量研究。该文介绍了在热室中通过远程控制测量装置对秦山一期的8根乏燃料元件进行的涡流氧化膜厚度测量工作,所得测量结果准确度较高,可以认为该方法是研究全尺寸乏燃料元件表面氧化膜厚度的较好方法之一。In the Pressurized Water Reactor(PWR),fuel elements are in the condition of high temperature,high pressure and high irradiation.And a dense black oxide f ilm can be formed on the surface of the fuel rod cladding.The oxidation f ilm will reduce the heat exchange capacity of fuel road,worsen the property of fuel element and inf luence the safety of the reactor.In order to complete the post-irradiation inspection of Qinshan PhaseⅠNPP f uel elements,for the f irst time in a domestic hot cell,a f ull-scale oxide f ilm thickness measurement study is done by using eddy current methods.In this paper,a nondestructive eddy-current is used to measure oxide f ilm thickness on the 8 fuel rods of Qinshan PhaseⅠNPP fuel elements.The obtained measurement results are highly accurate,and this method can be considered as one of the better methods for studying the thickness of the oxide film on the surface of the full-scale spent fuel element.

关 键 词：乏燃料棒 氧化膜测厚 涡流技术 热室 压水堆 

分 类 号：TL292[核科学技术—核燃料循环与材料]