The author estimates the impact of PR technologies on the development of nuclear power in Russia and in a number of foreign countries (USA, China, Japan, France). It is determined that as soon as at the stage of development of nuclear generation projects and other nuclear industry facilities, the use of public relations (PR), with a targeted impact on public opinion and interaction with target audiences (TA) at its core, has a significant impact on decision-making in favor of the construction of nuclear power plants, minimizes the protest behavior of the population. It is shown that the advantages of nuclear power among alternative energy sources for strengthening the socio-economic potential of states and increasing their environmental well-being are most clearly, quickly and effectively disclosed through using public relations tools. PR enables to form an adequate and correct understanding of the physical and chemical foundations of nuclear power engineering, the main threats and systems for their minimization or complete elimination at the conceptual, socio-psychological and socio-logical levels, as well as to form, in terms of specific objects and tools, the technological and organizational facilities for the development of nuclear energy projects both in Russia and in foreign countries. The activities of foreign and Russian companies aimed at ensuring loyal public opinion in relation to nuclear projects are critically described and analytically compared. The chronological framework covers the recent period: from the beginning of the 2000s to 2020. This period is noted as the most significant for the development of nuclear power in the world. Statistical data on changes in the attitude of the public in different countries to the prospects for the development of nuclear energy after the Chernobyl and Fukushima-1 disasters are presented. It is concluded that it is PR in its integrated application that contributes to government decision-making and public support in the construction of nuclear power plants in Russia and abroad.