The Advanced Fuel Cycle Initiative is developing a system dynamics model as part of their broad systems analysis of future nuclear energy in the United States.  The model will be used to analyze and compare various proposed technology deployment scenarios.  The model will also give a better understanding of the linkages between the various components of the nuclear fuel cycle that includes uranium resources, reactor number and mix, nuclear fuel type and waste management.   Each of these components is tightly connected to the nuclear fuel cycle but usually analyzed in isolation of the other parts.  This model will attempt to bridge these components into a single model for analysis.  This work is part of a multi-national laboratory effort between Argonne National Laboratory, Idaho National Laboratory and United States Department of Energy.   This paper summarizes the basics of the system dynamics model and looks at some results from the model.