This paper discusses the development of the German power system in the context of nuclear phase out. An energy system model has been developed to study different scenarios taking into account an immediate or a delayed phase out of the operating reactors. The model has a regional focus considering the plans of the German government regarding renewable technologies expansion and the current installed capacity of all the power generating technologies. The model is developed using OSeMOSYS, an open source energy modelling system (Mark Howells, 2011) and provides information on the energy production, installed capacity, and GHG emissions for the simulate years (2013-2055). The results of each scenario is then discussed and compared to the EU and Energiewende targets for 2020, 2030 and 2050. A second objective of the study is to set up the priorities in research and innovation in nuclear power. Hence, the technology priorities are evaluated in terms of expenditure, number of patents, and number of publications, categorized by countries or regions. Indicators are used to analyze the future of research and innovation in the field of nuclear power.

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