Nuclear Engineering and Technology

  • 제52권6호
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  • Pages.1243-1251
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  • 2020
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  • 1738-5733(pISSN)
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  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
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Characterization of the effect of He+ irradiation on nanoporous-isotropic graphite for molten salt reactors

  • Zhang, Heyao (School of Physics and State Key Laboratory of Crystal Materials, Shandong University) ;
  • He, Zhao (Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences) ;
  • Song, Jinliang (Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences) ;
  • Liu, Zhanjun (Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences) ;
  • Tang, Zhongfeng (Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences) ;
  • Liu, Min (Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences) ;
  • Wang, Yong (Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences) ;
  • Liu, Xiangdong (School of Physics and State Key Laboratory of Crystal Materials, Shandong University)
  • 투고 : 2019.03.27
  • 심사 : 2019.11.28
  • 발행 : 2020.06.25
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초록

Irradiation-induced damage of binderless nanoporous-isotropic graphite (NPIG) prepared by isostatic pressing of mesophase carbon microspheres for molten salt reactor was investigated by 3.0 MeV He+ irradiation at room temperature and high temperature of 600 ℃, and IG-110 was used as the comparation. SEM, TEM, X-ray diffraction and Raman spectrum are used to characterize the irradiation effect and the influence of temperature on graphite radiation damage. After irradiation at room temperature, the surface morphology is rougher, the increase of defect clusters makes atom flour bend, the layer spacing increases, and the catalytic graphitization phenomenon of NPIG is observed. However, the density of defects in high temperature environment decreases and other changes are not obvious. Mechanical properties also change due to changes in defects. In addition, SEM and Raman spectra of the cross section show that cracks appear in the depth range of the maximum irradiation dose, and the defect density increases with the increase of irradiation dose.

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