Atomic Energy

, Volume 125, Issue 3, pp 194–197 | Cite as

Investigation of the Character of Stored-Energy Release from Graphite Irradiated at High Temperature

  • E. P. Belan
  • D. V. Khar’kov
  • A. V. Avdonin

The results of an investigation of the stored energy in GR-280 graphite irradiated at 560°C to neutron fluence ~3·1026 m–2 are presented. The measurements were performed by means of differential scanning calorimetry with constant heating rate 20°C/min. The release of the stored energy reaches a maximum at annealing temperature 1100°C. The maximum output is equal to 0.34–0.48 J/(g·°C). The total stored energy released in the annealing temperature range 560–1300°C does not exceed 183 J/g. A kinetic analysis of the spectrum of the stored energy was performed. This analysis established that increasing the radiation temperature from 450 to 560°C results in almost complete vanishing of individual vacancies, redistribution of the migration of di-vacancies, and evolution of a cluster structure upon post-radiation annealing in the range 560–1300°C in the direction of processes with lower activation energy.


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • E. P. Belan
    • 1
  • D. V. Khar’kov
    • 1
  • A. V. Avdonin
    • 1
  1. 1.State Science Center – Research Institute for Atomic Reactors (GNTs NIIAR)DimitrovgradRussia

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