The Concept mission is to involve authorities, nuclear industry and general Russian public in the process of the timely planning of safe decommissioning of nuclear power units, which have reached their design lifecycle limit. Decommissioning is a complex, expensive and long-term process. It requires the integrated solution of technological, environmental, social, financial and ethical problems. For the Concept preparation the available Russian experience has been analyzed, other sources included materials and documents acquired during trips and acquaintance with the decommissioning experience of Ignalina NPP (Lithuanian town Visaginas) and NPP Nord (German town Greifswald). Both nuclear plants had units similar to those, which are operated in the North-West Russia (Leningrad and Kola NPPs).