RDS-1
First Soviet nuclear bomb / From Wikipedia, the free encyclopedia
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Quick Facts Type, Place of origin ...
RDS-1 | |
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Type | Nuclear weapon |
Place of origin | Soviet Union |
Specifications | |
Mass | 4.6 tons |
Blast yield | 21 kt (88 TJ) |
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The RDS-1 (Russian: РДС-1), also known as Izdeliye 501 (device 501) and First Lightning (Russian: Пе́рвая мо́лния, tr. Pyérvaya mólniya, IPA: [ˈpʲervəjə ˈmolnʲɪjə]),[1] was the nuclear bomb used in the Soviet Union's first nuclear weapon test. The United States assigned it the code-name Joe-1, in reference to Joseph Stalin. It was detonated on 29 August 1949 at 7:00 a.m.,[2] at the Semipalatinsk Test Site, Kazakh SSR,[3] after top-secret research and development as part of the Soviet atomic bomb project.[citation needed]