Nuclear power needs a fuel recycle reactor. This program should be the cornerstone of the U.S. advanced nuclear technology development program. The capability of operating nuclear power plants with recycled fuel is far more important than the capability of operating nuclear plants at higher temperatures. The benefits of increasing thermal efficiency are minuscule when compared to the benefits of increasing nuclear fuel efficiency. .. .. Even after the first cycle, with the burnup that was routinely achieved in EBR-II, this fuel will contain much too high of a concentration of higher isotopes of plutonium and other actinides to be attractive for weapons.