- Recognized as a crucial component of the long-term development of nuclear power. Their closed fuel cycle can support long-term nuclear power development as part of the world’s future energy mix and decrease the burden of nuclear waste. - Fast reactors utilize a fast neutron spectrum, allowing for increased energy yield from natural uranium compared to thermal reactors. - This high fuel utilization can extend nuclear power programs for thousands of years and improve nuclear waste management. - Fast reactors have been developed for decades in several countries, primarily as breeders and more recently as high-level waste burners. - Types of Fast Reactors: - Sodium-cooled fast reactors, lead and lead-bismuth cooled fast reactors, and gas-cooled fast reactors are being developed at national and international levels. - Development focuses on safety, sustainability, economics, physical protection, and proliferation resistance. - The molten salt fast reactor concept is also being considered as a long-term option.