Nuclear chain reaction the last one called ""Perfectionnement aux charges explosives"" was the first patent for the atomic bomb and is filed as patent n°445686 by the Caisse nationale de Recherche Scientifique. In parallel, Szilárd and Enrico Fermi in New York made the same analysis. This discovery prompted the letter from Szilárd and signed by Albert Einstein to President Franklin D. Roosevelt, warning of the possibility that Nazi Germany might be attempting to build an atomic bomb. On December 2, 1942, a team led by Enrico Fermi produced the first artificial self-sustaining nuclear chain reaction with the Chicago Pile-1 (CP-1) experimental reactor in
EPR (nuclear reactor) In October 2017 the date was pushed back to the beginning of 2019, and in June 2018 to September 2019 due to testing delays. In November 2018 a further delay of four months was announced: regular electricity generation is due to start in January 2020. First concrete was poured for the demonstration EPR reactor at the Flamanville Nuclear Power Plant on 6 December 2007. As the name implies this will be the third nuclear reactor on the Flamanville site and the second instance of an EPR being built. Electrical output will be 1630 MWe (net). The project was planned to