Application of synchrotron radiation in nuclear graphite
Nuclear graphite,as a well neutron moderator,has superior thermal and mechanical properties,and high-temperature resist-ance 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.Com-pared 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.
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