International Atomic Energy Agency

The International Atomic Energy Agency (IAEA) uses nuclear safeguards to check that nuclear material committed to peaceful use is not diverted to nuclear weapons or other nuclear explosive devices. Its verification authority comes from safeguards agreements with states, which specify the material, facilities, information and access covered.

Purpose and legal scope

Safeguards provide independent verification of states' nuclear non-proliferation commitments. Their technical objective includes the timely detection of diversion of significant quantities of nuclear material and deterrence through the risk of early detection.

• Under the Nuclear Non-Proliferation Treaty (NPT), non-nuclear-weapon states parties must accept safeguards on nuclear material in all peaceful nuclear activities.
• A comprehensive safeguards agreement covers all such material within the state's territory, under its jurisdiction or under its control anywhere.
• Other safeguards agreements can have narrower coverage, so the IAEA's mandate is not identical in every state.

How verification is carried out

The IAEA compares state declarations with independently obtained evidence to assess whether safeguards obligations are being fulfilled.

• States provide nuclear material accounting reports and relevant facility information; inspectors verify records, material inventories and declared activities.
• Verification techniques include inspections, measurements, seals, surveillance and environmental sampling, as authorised by the applicable legal arrangements.
• An Additional Protocol expands information requirements and access, helping the Agency investigate indications of undeclared nuclear material and activities.
• The Agency's access is legally defined; safeguards do not create an unrestricted right to inspect any location at any time.

Conclusions, limits and non-compliance

A central distinction is between verifying declared material and establishing confidence about the absence of undeclared material and activities.

• Where verification supports it, the IAEA can conclude that declared nuclear material remained in peaceful activities.
• For a state with a comprehensive safeguards agreement and an Additional Protocol in force, sufficient verification can support the broader conclusion that all nuclear material remained in peaceful activities.
• Safeguards conclusions do not certify the safety of nuclear facilities or establish that every possible weapons-related activity is absent.
• The Board of Governors can call for non-compliance to be remedied and report it to the United Nations Security Council and General Assembly; the IAEA does not itself impose UN sanctions.