Scaling up investment flows in nuclear energy is one of the major challenges for OECD and NEA countries that have decided or are considering the construction of nuclear power plants. This report offers a comprehensive review of global financing strategies, aiming to establish a common vocabulary and basis for comparative analysis to identify and discuss key lessons learnt about the relative merits of different strategies to finance nuclear projects. While there are no simple solutions for financing new nuclear projects, this report helps identify the “building blocks” that policymakers and private sector decision makers can leverage to help finance a tripling of nuclear energy by 2050.