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RDS-1
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The RDS-1 (), also known as First Lightning (), was the first nuclear weapons test that was conducted by the Soviet Union. It was detonated on 29 August 1949 at 7:00 a.m. Kazakhstan Time (decree time) (UTC+06:00), at the Semipalatinsk Test Site in the Kazakh Soviet Socialist Republic, and yielded 22 kilotons of TNT.

Key facts

Nuclear weapons test.name
RDS-1РДС-1
Nuclear weapons test.image
Joe one.jpg
Nuclear weapons test.caption
The mushroom cloud from RDS-1, the first Soviet nuclear test
Nuclear weapons test.country
Soviet Union
Nuclear weapons test.test_site
Semipalatinsk Test Site, Kazakhstan
Nuclear weapons test.date
29 August 1949
Nuclear weapons test.number_of_tests
1
Nuclear weapons test.test_type
Tower
Nuclear weapons test.next_series
RDS-2

via Wikipedia infobox

~8 min read

Encyclopedic overview

8 sections
Contents
  • Etymology
  • Description
  • Detection by the West
  • Response in the West
  • Response in the Soviet Union
  • See also
  • References
  • External links

The RDS-1 (), also known as First Lightning (), was the first nuclear weapons test that was conducted by the Soviet Union. It was detonated on 29 August 1949 at 7:00 a.m. Kazakhstan Time (decree time) (UTC+06:00), at the Semipalatinsk Test Site in the Kazakh Soviet Socialist Republic, and yielded 22 kilotons of TNT.

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. RDS-1 also refers to the model of nuclear gravity bomb put into weapons production, with 29 bombs stockpiled by 1951.

Excerpted from Wikipedia’s “RDS-1” article, available under the CC BY-SA 4.0 licence.

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