sterlingda writes: "Toshiba has developed a new class of nuclear reactor 100 times smaller than a standard reactor. These micro sized nuclear reactors could be used to power large houses, apartment blocks or some city blocks. The new 200 kilowatt reactor, which is only 20 feet by 6 feet is engineered to be fail-safe and totally automatic and will not overheat. The new micro reactor uses no control rods to initiate the reaction, but uses reservoirs of liquid lithium-6, an isotope that is effective at absorbing neutrons. The whole whole process is self sustaining and can last for up to 40 years, producing electricity for only 5 cents per kilowatt hour, about half the cost of grid energy. Toshiba expects to install the first reactor in Japan in 2008 and to begin marketing the new system in Europe and America in 2009."