Uranium resources are well-distributed around the world, with an important share in OECD countries (especially Australia, Canada and the United States). Because of these properties, nuclear energy played an important role in ensuring the security of energy supply in many OECD countries. Update on the Crisis Capability Index and the Supply/demand Index Quantification for EU-27, ECN-E-07-004/CIEP, www.ecn.nl/docs/library/report/2007/e07004.pdf. In this context, a source of energy such as nuclear, which is not strongly dependent on the access to imported fuels and can produce electricity with domestic infrastructures at a stable cost, provides the basis for reliable energy supply.