[en] The electrical properties of epdm-pp blends as a function of the conductive filler used (HAF-N330) and the gamma-irradiation dose were investigated. The effect of filler loading on the electrical conductivity (σ_de as well as Gamma_de as well as Gamma_ac) reflects the mechanism of percolation where a relatively sharp increase above the critical concentration was detected. Evaluation of the average separation distance, d, between the carbon-black particles or aggregates confirms the blend system dependence on loading. From de conduction studies it is observed that Poole-Frenkel conduction mechanism is dominant for the blend systems above the threshold concentration (φ_c). While, the frequency dependence behavior on the dielectric constant for all samples is the result of interfacial polarization, i.e. Maxwell-Wagner effect, where values of ε at higher loading of filler are found to be reduced and exhibited more sensitive to a certain threshold of gamma-irradiation dose. Comparison between the data obtained from the modified empirical model and that of the experimental σ_ac values are in good agreement. Finally, one can suggest that the examined blend systems above the percolative threshold concentration can be used as a dosimeter, while at φ_c< 30 phr, it can be used as a product that has radiation protect property