The last nuclear reactor has not been built yet.
The first demonstration nuclear reactor was built in USA by Enrico Fermi in Chicago Stadium. Fermi was an Italian Physicist, best known for his work on Chicago Pile-1 (the first nuclear reactor). on 26 June 1954, in the town of Obninsk, near Moscow in the former USSR, the first nuclear power plant was connected to an electricity grid to provide power to residences and businesses. Nuclear energy had crossed the divide from military uses to civilian applications.
Discovery is the wrong term, it was visualised and built by a team under Enrico Fermi, 1942
Koeburg
The very first nuclear reactor was Chicago Pile 1. It was built for research and scientific use. The first nuclear reactor outside of a university was built (at Hanford, Washington) primarily to yield plutonium for the atomic bomb destined for Nagasaki, Japan. Nuclear reactors were built primarily for electrical generation beginning in about 1951.
The first nuclear reactor was in former Soviet Union that operated in year 1954 at obninisk.
Leo Szilard invented the nuclear reactor in 1933, but did not build it.Enrico Fermi built first nuclear reactor, CP-1 in 1942.Walter Zinn built the first nuclear power plant, EBR-1 in 1951.
TEDTalks - 2006 Taylor Wilson Yup I Built a Nuclear Fusion Reactor was released on: USA: March 2012
The Russians are working on the problem of creating a nuclear reactor fuel out of americium, but they're still working the problem. In addition, they haven't built a reactor that uses americium as a nuclear fuel yet, either.
It really depends on the nuclear reactor, but many are built to work specifically with that isotope.
Enrico Fermi at the U of Chicago squash court
The nuclear reactor was invented in 1933 by Leo Szilard, in London, but he did not try to build one. The first functioning nuclear reactor, CP-1, was designed and built in 1942 by Enrico Fermi, in Chicago, IL.