RDS-5
Plutonium-based Soviet atomic bomb
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Testing
The two versions of the RDS-5 were tested during a series of 3 tests on September 3, 8 and 10 1953 in the Semipalatinsk test site. The test on September 3 (Joe 6.[3]) was probably of the 2 kg version and achieved a yield of 5.8 kilotons (compared to the expected 9.2 kiloton yield). The test on September 8 was probably of the 0.8 kg version and yielded 1.6 kilotons.[1][2]