同步辐射技术在核石墨研究中的应用  

Application of synchrotron radiation in nuclear graphite

作　　者：乔旭 申克 叶丽古玛 周舟 Qiao Xu;Shen Ke;Yeli Guma;Zhou Zhou(School of Physics,Sun Yat-sen University,Guangdong Guangzhou 510275,China;College of material Science and Engineering,Hunan University,Hunan Changsha 410082,China;Institute of Nuclear&New Energy Technology,Tsinghua University,Beijing 100084,China)

机构地区：[1]中山大学物理学院,广东广州510275 [2]湖南大学材料科学与工程学院,湖南长沙410082 [3]清华大学核能与新能源技术研究院,北京100084

出　　处：《炭素技术》2024年第5期1-5,共5页Carbon Techniques

基　　金：国家自然科学基金项目(52103365);广东省创新创业团队项目(2021ZT09L227);广州市基础与应用基础研究项目(202201011201)。

摘　　要：核石墨作为良好的中子慢化剂,拥有优异的热学性能和机械性能,以及在无氧化剂条件下的高温耐受性,被广泛应用于第四代反应堆中,如高温气冷堆和熔盐堆。在反应堆运行过程中,中子辐照或熔盐浸渗可能会破坏核石墨的微观结构。因此,了解核石墨的微观结构对于其制造和选择至关重要。与传统光源相比,同步辐射光源能够:提供更高信噪比的数据,更好的空间和时间分辨率;为原位实验搭建平台;通过多技术联用,获取多角度、多尺度的数据。从X射线计算机断层扫描、衍射、散射和吸收近边结构光谱等4个方面,介绍了同步辐射在核石墨研究中的应用,为核石墨的研究提供了新的视角和方法。Nuclear graphite,as a well neutron moderator,has superior thermal and mechanical properties,and high-temperature resistance under oxidant-free conditions.It is widely used in fourth-generation reactors,such as high-temperature gas-cooled reactors and molten salt reactors.During the operation of the reactor,neutron irradiation or molten salt infiltration may damage the microstructure of the nuclear graphite.Therefore,understanding the microstructure of nuclear graphite is crucial for its manufacturing and selection.Compared with conventional light sources,synchrotron radiation can provide data with higher signal-to-noise ratio and better spatial and time resolution;provide a platform for in-situ experiments;and obtain multi-view,multi-scale data through multi-technique integration.This article introduces the application of synchrotron radiation in the study of nuclear graphite from four aspects:X-ray computed tomography,diffraction,scattering,and absorption near-edge structure spectroscopy,which would be helpful to provide a new perspective and method for the study of nuclear graphite.

关 键 词：核石墨 同步辐射 结构表征 

分 类 号：TL35[核科学技术—核技术及应用]