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


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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.

作者简介

E. Belan

State Science Center – Research Institute for Atomic Reactors (GNTs NIIAR)

Email: j-atomicenergy@yandex.ru
俄罗斯联邦, Dimitrovgrad

D. Khar’kov

State Science Center – Research Institute for Atomic Reactors (GNTs NIIAR)

Email: j-atomicenergy@yandex.ru
俄罗斯联邦, Dimitrovgrad

A. Avdonin

State Science Center – Research Institute for Atomic Reactors (GNTs NIIAR)

Email: j-atomicenergy@yandex.ru
俄罗斯联邦, Dimitrovgrad

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