Kazakhstan Marks 35 Years Since Closing Semipalatinsk Nuclear Test Site

Thirty-five years ago, on August 29, 1991, Kazakhstan made a landmark decision to permanently close the Semipalatinsk nuclear test site. This act not only defined the nation's trajectory but also cemented its place on the global stage as a proponent of peace and nuclear disarmament. The significance of this closure continues to resonate, underscoring Kazakhstan's commitment to a world free from nuclear threats.

Between 1949 and 1989, Semipalatinsk was the site of 456 nuclear explosions, a period that inflicted severe radioactive contamination on local communities and left a multi-generational legacy of health and environmental consequences. UN Secretary-General António Guterres aptly stated this year, "their suffering is not history. It is a warning." The closure, therefore, represented more than an administrative act; it was a profound political choice made even as the Soviet Union's future remained uncertain.

This decision became a cornerstone of independent Kazakhstan's foreign policy. The legacy of Semipalatinsk also owes much to civil society, particularly the Nevada-Semipalatinsk movement founded in 1989. Led by poet Olzhas Suleimenov, this movement transformed opposition to nuclear testing into a powerful public cause, with demonstrations and peace marches creating the political momentum necessary for the site's closure.

Following the closure, Kazakhstan took further significant steps toward global nuclear security. The country renounced the world's fourth-largest nuclear arsenal, joined the Treaty on the Non-Proliferation of Nuclear Weapons as a non-nuclear-weapon state, and ratified the Comprehensive Nuclear-Test-Ban Treaty (CTBT). Kazakhstan also played a key role in establishing the Central Asian Nuclear-Weapon-Free Zone and has actively worked with international partners to bolster the global nonproliferation regime. In recognition of its efforts, Kazakhstan proposed August 29 as the UN International Day against Nuclear Tests, an initiative unanimously adopted by the General Assembly, transforming a national commemoration into a global observance.

Kazakhstan's contribution extends beyond declarations. Its territory now hosts five stations that are part of the CTBT's International Monitoring System, providing real-time data for global verification. Furthermore, the country hosts the IAEA Low Enriched Uranium Bank in Oskemen, a crucial international mechanism designed to ensure access to nuclear fuel while discouraging the development of independent enrichment capabilities. Kazakhstan has also prioritized the humanitarian aspects of nuclear testing's legacy, collaborating with nations like Kiribati, which was also affected by testing, to advance victim assistance and environmental remediation efforts.

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their suffering is not history. It is a warning.