ON THE POSSIBILITY OF COEXISTENCE OF DISLOCATION LOOPS OF DIFFERENT NATURE IN ZIRCONIA WITHIN THE FRAMEWORK OF CLASSICAL ELASTIC THEORY

A distinctive feature of the radiation-induced microstructure of zirconium is, firstly, the coexistence of prismatic loops of different natures, and secondly, the nucleation and growth to large sizes of vacancy basis loops. In the work, within the framework of classical concepts of elastic interaction between a point defect and internal sink the results of numerical calculations of the dependence of bias loops of different natures lying in the basal and prismatic planes of zirconium on their radius are presented. The essential role of the form of the boundary condition on the outer surface of loop area of influence in toroidal geometry is shown. Possibilities, both the coexistence of prismatic loops of different natures and the growth of vacancy basis loops are discussed.