(\ln (A_i))}{\sum n_i},$$ where $n_i$ denotes the number of elements $i$ with mass number $A_i$. The initial composition at $10^{12}$ eV is $<\ln(A)> =
1.41$ ([@wiebel]).

Results and conclusions
-----------------------

We have used only one above discussed model of GMF in our simulation, although it was improved by random components of the turbulent magnetic field. We have confirmed the influence of such turbulent magnetic fields on the propagation of CRs for all studied nuclei energies.

We find following results in our simulation:

-   [The dependence of nuclei escape rate on the energy is similar for all configurations of magnetic fields (Fig. \[radek2\]). Except configuration without turbulent magnetic field all values of nuclei escape rate are lower than 7% at our starting energy $10^{13}$ eV (even for protons). Thereafter up to $10^{15}$ eV the leakage depends on the charge, the higher charge, the lower is number of nuclei escape rate. In the energy range $10^{15}\div10^{16}$ eV the nuclei escape rate of light nuclei (H, He) becomes constant and the values of heavier elements come closer to them. The differences between cells with dimension equal to 10 pc are 10%, the lowest value is for the configuration with the highest rate of 