Further development of a fusion–fission hybrid facility based on a superconducting tokamak, DEMO-FNS, continues in Russia for integrated commissioning of steady-state and nuclear fusion technologies at a power level up to 40 MW fusion and 400 MW fission reactions. This facility is considered as the main source of technological and nuclear scientific information in the RF National program on controlled fusion and plasma technologies that is currently being developed and submitted to the authorities for approval. In this work the progress over the last two years is reported in core plasma modelling, design and integration of enabling systems, including the first wall, divertor, neutron beam heating and current drive, as well as the choice of materials. Use of supercritical CO2 coolant was reviewed from an activation point of view. Interaction of fusion–fission hybrid systems with the nuclear fuel cycle of Russia's nuclear power industry was shown. Сonstruction of the device is expected in 2033.