Uraniumdominant

Uranium-dominant refers to a type of nuclear fuel cycle where the primary fissile material used in nuclear reactors is uranium-235, rather than plutonium. This approach is commonly employed in light water reactors (LWRs), which are the most prevalent type of nuclear power reactors worldwide. In a uranium-dominant cycle, enriched uranium fuel is used, typically containing 3-5% uranium-235. This enrichment process separates uranium-235 from the more abundant uranium-238 isotope, which is not fissile.

The uranium-dominant cycle has several advantages. It is relatively straightforward and well-understood, with a long history of safe and reliable operation. The fuel cycle is also relatively short, with fuel being used for about 18-24 months before being replaced. Additionally, the spent fuel from uranium-dominant reactors is less radioactive and generates less heat, making it easier to handle and store.

However, the uranium-dominant cycle also has some limitations. The enrichment process is energy-intensive and can be a source of proliferation concerns. The fuel cycle also produces a significant amount of spent fuel, which requires long-term storage or disposal. Furthermore, the uranium-dominant cycle does not efficiently utilize the energy potential of uranium-238, which can be converted into plutonium-239 in a fast breeder reactor.

Despite these limitations, the uranium-dominant cycle remains a cornerstone of the global nuclear power industry. It provides a reliable and low-carbon source of electricity, contributing to the mitigation of climate change. The continued development and improvement of this fuel cycle are essential for the sustainable growth of nuclear power.