What are South Africa's opinions on nuclear weapons? Are they in favor
of use or opposed to their use? Specific examples are needed.

I would have thought VERY opposed. I cannot give you an example but
the current Black government would not want to emulate the legacy of
the prior white government which had actually made six nuckear weapons
but probably never tested a nuclear weapon

DPRK007

As of the mid 90's South Africa opposes nuclear weapons. They are one
of the few states to have acquired nuclear weapons and actuall disarm.
They aren't opposed to nuclear energy and support Irans pursuance of
nuclear energy and claims it is every countries right to do this. They
have said they hope one day for a world without nuclear weapons.

"South Africa will not accept any prevention of the use of nuclear
power for peaceful purposes. It is a demand we make and we support
Iran in that regard," Deputy Foreign Affairs Minister Aziz Pahad said.
Pahad made the statement in Pretoria on the first day of the second
session of the SA-Iran Deputy Ministerial Working Group's meeting. He
emphasized South Africa sought a world free from nuclear weapons."

South Africa has although built nuclear weapons in the past, 5 fission
bombs and people question their motives on why they persued nuclear
weapons. South Africa claims it was strictly peaceful and for self
defense.

"The ANC-led government has inherited the legacy of South Africa's
secret nuclear weapons, but some want to know if the country's weapon
program could be revived--whether South Africa might have the first
"Black Bomb." Given the ANC's consistent anti-nuclear stance, this
question is unfair. But it reflects a natural concern that a dangerous
technology will pass into new, untested hands."

Sources:
http://www.zmag.org/content/showarticle.cfm?ItemID=3280

http://english.peopledaily.com.cn/200507/12/eng20050712_195522.html

http://www.thebulletin.org/article.php?art_ofn=ja94albright


Hope I was of some help,
Cheers!