Abstract
Some basic design and fuel element considerations in the development of large, fast breeder power reactors are analyzed on the basis of experimental and calculated results. Nuclear safety and stability, breeding, and economy are three principal requirements for developing large, fast power reactors. For nuclear safety and stability, the Doppler reactivity effect, sodium void (or loss) reactivity effect and structural expansion reactivity effect are analyzed. For breeding, the breeding ratio and gain, and the doubling time of fuel production are presented. Thermal and structural considerations of fuel element design are outlined. For economy, as well as breeding, the development of a ceramic (especially carbide) plutonium fuel system with higher power density and specific power for the large, fast power reactor system is desirable.
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