Fast breeder reactors aim to produce more fissile material than they consume, extending the energy produced from uranium resources. They achieve this through breeding, where fertile uranium-238 is transformed into fissile plutonium-239. Fast breeder reactors also allow for recycling of nuclear waste by burning minor actinides. The Experimental Breeder Reactor I produced the first nuclear electricity in 1951. It was followed by Experimental Breeder Reactor II which operated successfully for over 25 years. Prototype fast reactors have been built up to 250 MWe power levels while commercial plants have reached 1200 MWe like Super Phénix-1 in France. Fast reactors have inherent safety advantages due to their negative temperature