Abstract
The historical development and modifications to the “single-phase model” of the graphite structure, used to interpret and predict behavior during neutron irradiation, are outlined. In the singlephase model all parts of the artificial graphite aggregate are assumed to behave as if they were part of a graphite crystal lattice. It is shown that changes occurring in the non-graphitic carbon phase, relief of internal stresses induced during cool-down from graphitization temperature, and chances in the crack structure of the graphite aggregate must also be considered in interpretation of dimensional changes produced during high-temperature irradiations.
Published Version
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