The independent resource on global security

Nuclear disarmament, arms control and non-proliferation

Museum of Science and Industry in Hiroshima, Japan on 6 August 1945
Museum of Science and Industry in Hiroshima, Japan on 6 August 1945. Photo: Everett Historical

Nuclear weapons have been one of the core areas of SIPRI’s research programme since the founding of the institute. Together with biological and chemical weapons, SIPRI promotes their non-proliferation and disarmament. Our work includes looking at legal, political, technical and historical aspects of biological, chemical and nuclear warfare prevention, including the verification of weapons and the implementation of international treaties.

An important part of SIPRI's work on nuclear weapons is its world nuclear forces data, which reveals annual estimates on the number and types of nuclear weapons held around the world.

Additionally, SIPRI is one of four institutes managing the EU Nonproliferation Consortium, a group of research centres and think tanks that promotes the non-proliferation of weapons of mass destruction.


World nuclear forces

SIPRI tracks nuclear arsenals worldwide.


Military exercise for radiation accidents in Bolsoi Kamen, Russia, 2013

SIPRI works to improve chemical and biological security.

Opening meeting of the 2010 Review Conference of the Parties to the Treaty on the Non-Proliferation of Nuclear Weapons (NPT), held in New York, USA

SIPRI follows the Treaty on the Non-Proliferation of Nuclear Weapons (NPT), which is officially reviewed every 5 years.

EU flags in Brussels, Belgium

The EU Non-Proliferation and Disarmament Consortium forms the core of a wider network of European non-proliferation and disarmament think tanks and research centres which the Consortium is responsible for promoting and coordinating.

Inside the flight tube of a mass spectrometer, an instrument used in nucler forensics

SIPRI contributes to the new and growing field of nuclear forensics.