The essence of the presented herewith idea of coal-nuclear symbiosis lies in several mutually coupled elements: In the first, H2 is obtained by electrolytic water splitting, together with O2 as a precious by-product. The energy necessary for this process is supplied from the nuclear reactor. The O2 can be used e.g. for oxy-combustion in the coal fired power plant, thus facilitating sequestration of CO2 while H2 is supplied to the liquid fuel factory. The present concept allows for achievement of a number of aims: if necessary, the electricity produced in the nuclear power plant can be supplied to the national grid to cover peak demand; liquid fuels are produced without emissions i.e. without carbon tax from home energy carriers – coals; all this heightening energy security of the country. Great resources, natural, technical and human of the coal sector of Poland can be best utilized. Summarizing: the coal-nuclear synergy is the optimum far-sighted concept of development of the Polish energy sector.