What is the IFR? You mean, “What was the IFR?” O.K., what was the IFR? IFR stands for Integral Fast Reactor. It was a power-reactor-development program, built around a revolutionary concept for generating nuclear power – not only a new type of reactor, but an … Continue reading Integral Fast Reactors: Source of Safe, Abundant, Non-Polluting Power, by George S. Stanford, Ph.D.