5 August 1965
Dr. H.F. Verwoerd opened South Africa's first atomic reactor, SAFARI-1 (South African Fundamental Atomic Reactor Installation-1) at Pelindaba, about thirty km West of Pretoria. The installation was not intended for the production of nuclear energy on a commercial scale, but was employed for research and the production of isotopes, useful in several fields. Nuclear power would be used for peaceful purposes only, with the provision of additional energy as one of its chief aims. A secret project was begun by the Atomic Energy Board in the early 1970s to develop a unique uranium enrichment technology. Although initially devoted to peaceful nuclear research a program of weapons development began with research on nuclear explosive design in 1971. The decision to "develop a limited nuclear deterrent capability" was made in 1974. Links: Article in our online library titled, 'From peaceful nuclear research to building the bomb'.
References

Kalley, J.A.; Schoeman, E. & Andor, L.E. (eds)(1999). Southern African Political History: a chronology of key political events from independence to mid-1997, Westport: Greenwood.|Potgieter, D.J. et al. (eds)(1970). Standard Encyclopaedia of Southern Africa, Cape Town: NASOU, v. 4, p. 321.|Potgieter, D.J. et al. (eds)(1970). Standard Encyclopaedia of Southern Africa, Cape Town: NASOU, v. 8, p. 243.