A Retrospective of INFCIRCs 153 and 540
4.6 The Evolution of Safeguards (8:22)
Supplemental Information
South Africa, after concluding that it no longer needed its nuclear arsenal, scrapped the six weapons it had built, stopped assembly of a seventh, and subsequently signed the NPT in 1991, concluding a safeguards agreement with the International Atomic Energy Agency (IAEA) later that year. The Agency required three years to complete inspections on the extensive South African nuclear infrastructure and to declare that the weapons program had been dismantled.
National Technical Means (NTM) is a verification method traditionally referring to intelligence collected by satellite.
Hans Blix served as Director General of the IAEA from 1981 to 1997.
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