Abstract
An approach developed by the authors is used to perform a comparative calculation of the primary radiation damage in graphite for neutron spectra corresponding to research-and power-reactor cores. The modern cross sections for the interaction of a neutron with a carbon nucleus are used to describe the formation of the spectrum of primary knock-out atoms. The cross sections for atom-atom processes in the description of the evolution of cascades of atomic displacements up to the formation of Frenkel pairs are calculated from first principles. The concept of the threshold energy Ed for the formation of a Frenkel pair is redefined and it is shown that the results are stable with respect to variations of the latter over a wide range. The conventional empirical normalizations of the dose dependences are explained. The numerical results obtained make it possible to recalculate the irradiation dose to graphite by transferring the data from one reactor to another.
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