Optimization of the Amount of Coke Filling Usage in Cathodic Protection Systems for an Anode Grounding Model in the form of a Hemisphere

In this work, we calculated the optimal amount according to "annualized costs" criteria on the basis of model representations for anodic grounding of the cathodic protection system in the form of a single hemisphere, which is located on the surface of the ground and contains coke backfilling. At the same time, calculations were made for a similar grounding, but without the use of coke filling, which allowed comparative analysis and calculation of their comparative economic efficiency, depending on the specific resistance of the soil. As a result of these calculations, we proposed a modernized anodic grounding with a normalized amount of coke filling that has increased safety in comparison with the traditional product, since it allows reducing risks, caused by generation of positive DC stray currents of cathodic protection system, to other underground metal constructions. This quality of the proposed anode grounding is especially important in urban areas and at the territories of large industrial facilities characterized by an increased density of underground metal structures. (paper)