NOVELTY - Producing liquid synthetic fuels from carbon containing feedstock, for example biomass, waste paper or coal, which is allothermally gasified in a gasifier to produce syngas components, comprises employing nuclear reactor to superheat steam up to temperatures above 2.500 degrees C, at which hydrogen (H2) and oxygen (O2) are separated and then directed to the gasifier in the proportion required for the conversion of the syngas components into liquid fuels by Fischer-Tropsch synthesis.    USE - The method is useful for producing liquid synthetic fuels from carbon containing feedstock (claimed).    ADVANTAGE - The heat is recycled wherever possible and thus maximum energy efficiency and maximum material utilization from the feedstock and the geothermal steam are simultaneously achieved.    DETAILED DESCRIPTION - Producing liquid synthetic fuels from carbon containing feedstock, for example biomass, waste paper or coal, which is allothermally gasified in a gasifier to produce syngas components by application of external energy such as: (i) high temperature geothermal steam, hydro-electricity, and/or heat derived from nuclear reactors; (ii) recycled heat from a syngas product; (iii) optionally additional heat produced by combustion of tail gas in a combustor of the gasifier; and (iv) optionally recycled energy in the form of electricity, generated by high temperature steam generated by the process, applied to electrical heating elements, comprises employing nuclear reactor to superheat steam up to temperatures above 2500 degrees C, at which hydrogen (H2) and oxygen (O2) are separated and then directed to the gasifier in the proportion required for the conversion of the syngas components into liquid fuels by Fischer-Tropsch synthesis. An INDEPENDENT CLAIM is system for performing the method in order to produce liquid synthetic fuels of high energy content, other forms of energy and by-products for industrial production of e.g. gypsum or cement or from carbon containing feedstock, for example biomass, waste paper or coal, comprising: (a) a subsystem for preparation of raw material consisting of an inlet for raw material, at least one unit for grinding, a hopper for collecting the material, heat exchanger system where geothermal steam is introduced with heat from recirculated syngas, a mixer where the steam and the raw material is thoroughly blended; (b) a subsystem for degrading chemically the raw material, received from the mixer, consisting of a gasifier where the material is further heated with electric heaters and enriched with O2 and/or H2, produced by exposing water to a temperature above 2500 degrees C in a nuclear reactor, to produce syngas for further transport to a combustor where tar and other remaining material is combusted/pyrolyzed with the optional aid of heat generated from combustion of tail gas from a Fischer-Tropsch reactor, to produce carbon dioxide (CO2) gas that is removed; (c) a subsystem for recirculation of energy consisting of the circulation of syngas, the burning of tail gas, steam received from the combustor for production of electricity used in heating of the gasifier and/or used in the electrolytic production of O2 and H2 used in the gasification and/or the combustion process or distributed to the community and heat optionally obtained from CO2 and other gases reintroduced to the process; (d) a subsystem for cleaning consisting of a unit for the removal of sulfur, a unit for the removal of CO2, optionally re-introduced to the process or used in the synthesis of methanol, a unit for the removal of fly ash, a unit for the removal of calcium oxide (CaO) and silicon dioxide (SiO2) for the optional production of e.g. cement, and a scrubber for the cleanup of the syngas; (e) a subsystem for steam removal for the production of energy in the form of electricity for use in the process or for outside distribution and/or for district heating and/or other industrial uses or for providing energy to the process from the same.