This is especially true for advanced industrial or post-industrial societies, where electricity provides the essential services necessary for production, communication and exchange. Not surprisingly, governments of OECD countries are thus concerned with understanding the factors influencing the security of energy and electricity supplies and with developing policy frameworks and strategies to enhance them. Energy security here has two main dimensions: an external dimension that aims at ensuring a stable supply of imports and an internal dimension that is concerned with maintaining domestic infrastructures at adequate capacity levels and in good working conditions. This report aims to examine the role that nuclear energy can play in enhancing the security of electricity supply of OECD member countries.