Even under the most restrictive assumptions, the situation of uranium, which has very high energy intensity and can be easily stored and transported, still looks very favourable when compared with the limited availability and geographic concentration of other fuels such as oil and gas. One example is enrichment, where there are essentially only two international suppliers of enrichment services. Other, less pressing examples are constituted by the production of reactor pressure vessels, specific stainless steel tubes or high-quality graphite.