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arXiv · 1104.2335

Relation between measurable and principal characteristics of radiation-induced shape-change of graphite

M. V. Arjakov·A. V. Subbotin·S. V. Panyukov·O. V. Ivanov·A. S. Pokrovskii·D. V. Kharkov
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Abstract

On the basis of studies of radiation-induced shape-change of reactor graphite GR-280, through the series of measurements of samples with different orientation of cutting with respect to the direction of extrusion, a conclusion is made about the existence of polycrystal substructural elements - domains. Domains, like graphite as a whole, possess the property of transverse isotropy, but have different amplitudes of shape-change and random orientations of the axes of axial symmetry. The model of graphite, constructed on the basis of the concept of domains allowed to explain from a unified point of view most of existing experimental data. It is shown that the presence of the disoriented domain structure leads to the development of radiation-induced stresses and to the dependence of the shape-change on the size of graphite samples. We derive the relation between the shape-change of finite size samples and the actual shape-change of macro-graphite.

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M. V. Arjakov, A. V. Subbotin, S. V. Panyukov, O. V. Ivanov, A. S. Pokrovskii, D. V. Kharkov. 2011-04-12. Relation between measurable and principal characteristics of radiation-induced shape-change of graphite. https://arxiv.org/abs/1104.2335

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