Fedotov, A.V. JACoW Geneva, Switzerland The Low Energy RHIC electron Cooler (LEReC) system is presently under construction and commissioning at BNL. Although required energies of electron beam (few MeV) are not very high, an approach based on RF acceleration of electron beams was chosen. Required electron beam and its acceleration will be provided by the photoemission electron gun and the RF linear accelerator. As a result, cooling will be accomplished by using bunched electron beams produced by high-brightness high-current electron linear accelerator. Here, we describe design aspects and challenges of such an approach, as well as summarize status of the LEReC project. First commissioning results of the LEReC injector are also presented.