[en] Equations of alloy components and point defects diffusion that permit to describe segregation phenomena in irradiated alloys caused both by migration of impurity atom - proper interstitial atom complexes and the Kirkendall reverse effect, are formulated. For two types of segregation boundaries -coherent and incoherent - the rates of diffusion - limited growth of new phase segregations in concentrated alloys are determined. The method is shown for constructing phase diagram alloy under irradiation that is analogous with the diagram in the absense of radiation. Calculations are accomplished for phase diagrams of Ni-Si and Ni-Al alloys. 37 refs.; 6 figs.; 2 tabs