SA controlled namibia, which had a few bits of uranium in it.Informed folklore has it that this co-operation started when SA promised Israel a homeland in the Transvaal for survivors of a predicted massive war in the Middle East.
In return, Israel shared certain atomic information and SA 'facilities' with the pledge that it would assist their defence with the new wonder weapons if SA needed it. This was in the 60s and 70s with SA having a 'few' things (now gone) just to be on the safe side.
Only speculative 'talk' mind you and nothing to do with the French wanting to be involved but rebuffed by SA. Elaborate gossip, nothing more...
aaah, as if US/UK didn' t know?
And Koeberg nuke power station was built by the frogs.
And Blackburn/Bae did a bit of consulting at Atlas aviation when the bucaneers were modified to carry nukes...
and and and.