For some time now, many countries that design reactors have been considering the development of plants with a power range of less than 200 MWe ." Technology Uncovered" explains these reactors that enable more compact and modular designs and which are known as SMRs (Small Modular Reactors) . The emergence of renewable energy sources, as well as new uses of electricity (heat pumps, electric vehicles), the management of consumption peaks and the desire to constantly improve service quality have led to the development of new smart systems, particularly within distribution networks.