C.E. Boardman, C.E. Walter, M.L. Thompson, C.S. Ehrman - 2002 Feb: Explains the advantages of fast nuclear reactors which produce a lot more power and used fuel that is much easier to deal with.
Fast Nuclear reactors can consume the used once fuel that is generated by Thermal Reactors. As a result we can produce one hundred times more electricity for a given amount of uranium fuel. The spent fuel products from Fast Reactors are much cooler and less radioactive than the spent fuel from Thermal Reactors. This makes the isolated storage of this material much simpler. Clearly we should be considering the use of Fast Reactors as we build new reactors to address our growing appetite for electricity.