Fast breeder reactors.

Energy production by fast breeding remains the main goal of the Liquid Metal Fast Reactor (LMFR) to ensure a sustainable long term fissile fuel supply. In addition, the use of LMFRs allows the recycling of the Minor Actinides content of nuclear waste burning them to produce energy and reduce the amounts of disposed waste. Another advantage of the LMFR is its higher thermal efficiency compared with water-cooled reactors. The sustainable, environmentally clean long term use of nuclear power can be achieved with fast reactors, since thermal reactors are capable of burning less than 1 percent of the uranium fuel. It is surmised that the known reserves of uranium will fuel thermal reactors for only a few decades. Fast reactors burn most of the uranium fuel extending the power producing capability of the uranium reserves into the hundreds of years, making the recoverable energy resource from uranium larger than from coal.