Abstract
The model of the migration and accumulation at dislocations of transmutation helium and the formation of helium–vacancy pore nuclei in austenitic steels upon neutron irradiation has been proposed. As illustrations of its application, the dependences of the characteristics of pore nuclei on the temperature of neutron irradiation have been calculated. The results of the calculations have been compared with the experimental data in the literature on measuring the characteristics of radiation-induced porosity that arises upon the irradiation of shells of fuel elements of a 16Cr–19Ni–2Mo–2Mn–Si–Ti–Nb–V–B steel in a fast BN600 neutron reactor at different temperatures.
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