Kazakhstan marks 35 years since Semipalatinsk nuclear test site closure
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Kazakhstan on August 29, 2026 marks 35 years since the closure of the Semipalatinsk nuclear test site. The site, where the Soviet Union conducted 456 nuclear explosions between 1949 and 1989, was officially shut down on August 29, 1991. The anniversary is observed as the UN International Day against Nuclear Tests, established in 2009 on Kazakhstan's initiative.
Key Facts
- The Semipalatinsk test site was officially closed on August 29, 1991, 35 years before the 2026 anniversary.
- Between 1949 and 1989, 456 nuclear explosions were conducted at the site.
- The first Soviet atomic bomb was tested at the site on August 29, 1949.
- The Nevada-Semipalatinsk anti-nuclear movement was founded in 1989 on the initiative of Olzhas Suleimenov.
- In 2009, the UN declared August 29 as the International Day against Nuclear Tests on Kazakhstan's initiative.
Test Site History
The Semipalatinsk test site began operations in 1949, with the first Soviet atomic bomb tested on August 29 of that year. From 1949 to 1989, the site saw 456 nuclear explosions, affecting the health of nearby residents and the region's ecology. The test site was one of several in Kazakhstan, including Kapustin Yar, Azgyr, and Saryshagan, used for nuclear and missile tests.
Closure Movement
Public opposition to nuclear testing intensified in the late 1980s, leading to the creation of the Nevada-Semipalatinsk movement in 1989. The movement, initiated by poet Olzhas Suleimenov, mobilized thousands of citizens against the tests. On August 29, 1991, the test site was officially closed, marking one of Kazakhstan's first major steps toward nuclear disarmament.
Legacy and Commemoration
After the closure, the National Nuclear Center conducted extensive radiation studies covering more than 18,000 square kilometers of the former site. In 2023, Kazakhstan adopted a law on the Semipalatinsk nuclear safety zone, establishing a legal framework for long-term management of the territory. The city of Kurchatov, once associated with nuclear testing, is now developing as a center for scientific research and peaceful atomic energy. In 2009, the United Nations declared August 29 as the International Day against Nuclear Tests, following Kazakhstan's initiative.
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Kazakhstan marks 35 years since Semipalatinsk nuclear test site closure
