In the current economic situation regarding electric generation and conservation of the environment, it is essential to develop sustainable technologies. From this point of view, hydropower is an excellent resource with a consequently high value. The system presented herein aims to optimize the use of this energy while bringing a solution both economic and respectful of the environment. The studied submerged flow current turbines, consist of an assembly of two turbines immersed which converts the kinetic energy of the flow current into electric power without needing any weir structure, contrary to the traditional exploitation of the potential energy in a run-off-river plant. The designer chose Switzerland and more particularly the Rhone River as pilot project site for the first feasibility study in Europe. The study confirms the technical feasibility of the system.