In the 50s humanity succesfilly split the atom for peaceful purposes, bu useable energy was still produced by turning water to steam to spin a good old-fashioned turbine. In the 70s, after the discovery of teh Dome, a storm of technological wonders rained down. In particular, a completely new type of reactor was created. How does it work? Well, take some hephasitum, a rare Forefathers material that produces heat in the prescence of alcohol, and use it....turn good old-fashioned turbine.
Technologies Under the Dome magazine.