who was this person?
Hungarian-American physicist and inventor.
Leo Szilard
Leo Szilard (; ; born Leó Spitz; February 11, 1898 – May 30, 1964) was a Hungarian-American physicist and inventor. 
when did we first start using nuclear energy 1970's what is this power? It is a power that uses nuclear reactions that release nuclear energy to generate heat, which most frequently is then used in steam turbines to produce electricity in a nuclear power plant. what happens to the waste of this process? It is disposed. is it used in space ? Yes. has it faced any attacks? UNANSWERABLE where was this technology first used? United States of America any particular project in that country where this was used? Yes. The first man-made reactor, the research reactor known as Chicago Pile-1 what was its importance? The successful test of CP-1 not only proved that a nuclear reactor was feasible, it demonstrated that the "k" factor was larger than originally thought. what site was chosen for this? A suitable location long, wide and high, sunk slightly below ground level, in a space under the stands at Stagg Field where did the concept of this project originate from? It was first hypothesized by the Hungarian scientist Leo Szilard. He realized that if a nuclear reaction produced neutrons or dineutrons, which then caused further nuclear reactions, the process might be self-perpetuating.
wiki:5432452
Leo Szilard [SEP] Introduction
After Adolf Hitler became chancellor of Germany in 1933, Szilard urged his family and friends to flee Europe while they still could. He moved to England, where he helped found the Academic Assistance Council, an organization dedicated to helping refugee scholars find new jobs. While in England he discovered a means of isotope separation known as the Szilard–Chalmers effect.