1931 November - Harold Urey discovers deuterium, an isotope of hydrogen. 1944 November - First batch of spent fuel obtained from Hanford reactors.
November - Goudsmit's ALSOS mission obtains documents which imply that the German's rate of progress toward a bomb had diminished. 1955 November 22 - First fusion device test by the Soviet Union, it had a yield of 1.6 megatons. The development was lead by Andrei Sakharov. 1958 November, 1958 to September, 1961 - U.S., U.K., and U.S.S.R. observe an informal moratorium on nuclear tests. 1960 November 15 - first Polaris missile launched from a submarine. 1969 November to December - Preliminary SALT talks in Helsinki.More » 1972 November - SALT II negotiations begin. More » 1978 November - Three Mile Island Nuclear Power plant near Harrisburg, Pennsylvania suffers a partial core meltdown. Minimal radioactive material is released. More »