WikipediaExtracts:RDS-1
Extracted from Wikipedia --
The RDS-1 (Russian: РДС-1), also known as Izdeliye 501 (Device 501) and First Lightning (Russian: Пе́рвая мо́лния, romanized: Pyérvaya mólniya, IPA: [ˈpʲervəjə ˈmolnʲɪjə]), was the first test of a Soviet nuclear bomb. It was roughly based on the American design, Fat Man, and 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. MSK (UTC+03:00), at the Semipalatinsk Test Site in the Kazakh Soviet Socialist Republic.
