Several weeks ago Joshua Pearce at Clarion University in Pennsylvania released a study titled “ Thermodynamic limitations to nuclear energy deployment as a greenhouse gas mitigation technology .” In the study he stated... nuclear energy production would have to increase by 10.5% per year from 2010 to 2050 to both replace fossil-fuel-energy use and meet the future energy demands. This line, of course, made the headlines and has been picked up by several outlets and blogs . When looking into his calculations for this statement, he made one assumption error that overstated the above sentence by nearly a factor of three. Page 121, Section 4.1 of the study states: Richard Smalley pointed out that in 2004, the global economy consumed the equivalent of 220 million barrels of oil per day, which converted into electricity terms is the equivalent of 14.5 TeraWatts (TW), or 14,500,000 MegaWatts (MW) (2005). … With a nuclear plant having about 1000 MW (1 GW) of capacity, we would need 14,500...
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I would even include India, Pakistan and Israel in this category. The former two have resisted the temptation to go nuclear, despite open conflict at times, while Israel has refrained from using its nukes even when it was very close to being overrun in 1973, adding credence to their claim that the weapons are for last-gasp self-defence only.
Iran, on the other hand, cannot be trusted in this way, nor can North Korea. Iran's ongoing support for terrorist groups and its constant (and unwarranted) threats against Israel should give anyone cause to doubt their professed "peaceful" intentions, whilst NK's policy of selling nuke tech to whomever wishes to pay for it doesn't do wonders for non-proliferation.
Thus it makes sense to prevent Iran from enriching uranium, because its threats and actions (most especially the intense secrecy which surrounds its enrichment program) make it clear that it seeks not peaceful nuclear power but rather nuclear weapons. Not only is this in breach of the NPT, but it's undesirable from the standpoint of anybody in favour of peace and stability.
With that in mind, the impression I got from the Commentary post was not that they were saying that South Africa should not be allowed to enrich uranium, but rather that it had no convincing economic or strategic reason to do so. Certainly, the international community is not wary of SA's intentions and there's no worry about us going nuclear again, so any uranium enrichment by SA will be ignored.
For this reason, if SA's enrichment plans are indeed an attempt to show some sort of hollow solidarity with Iran, then it is quite plainly stupid (arguably just as stupid as showing solidarity with Iran in the first place). And as a South African, you really should be wary of our government potentially spending millions on a program which will run at an economic loss and bring no tangible benefit to us in any way.
In regard to your other question the Nuclear Non-Proliferation Treaty through the International Atomic Agency determines who is suitable. The main powers, including Russia and China are regarded as more stable and better custodians of such weapons for obvious reasons. Would you like a small regime that engages in drug smuggling, counterfeiting and spends 50% of it's GDP on arms while threatening to also start sharing atomic warheads with terrorists that could nuke your city? If you would know that it does exist - it's called North Korea.
If every individual or small nation must have the right to possess atomic warheads then you must also be prepared to start erasing cities from maps. After all, the increasing promotion of suicide bombers shows that the 'rational individual' argument is not a guarantee.
Apartheid South Africa possessed atomic bombs. If the 'verkramptes' had won the succession battle in the NP in the late 1980's and the country had collapsed into civil war do you think they wouldn't have been used?