"Nuclear power is a wonderful idea until you realize that to power a world population of 15 billion at U.S. levels of consumptive energy waste, over 200,000 nuclear reactors would need to be constructed world wide."
World population will likely never exceed about 12 billion, and the fraction of that population who will use power at the crazy rate currently seen in the USA will likely remain very small - indeed, it could well fall, as even Americans will realize that they are better off using power efficiently than they are paying for more electricity than they really need.
"300 in Iraq alone."
Iraq has nothing to do with anything here; but even if we imagine a wildly unlikely future in which Iraq uses the same per-capita energy as today's USofA, we find that we are imagining a world in which they have the technical expertise to do so without difficulty.
"Currently the world has around 450 of them, and 4 have blown up over the last 50 years. Roughly 1 percent."
Really? One blew up in the Ukraine, because it was a poor early design abused by its operators; one blew up in Japan because it was a poor early design hit by a huge tsunami, having been built in a poorly chosen location. I don't know what the other two you are referring to could be; Three Mile Island is the only other incident that springs to mind, but it would be completely wrong to describe that incident as 'blown up' - except perhaps in the phrase "An incident causing no fatalities that has been blown up out of all proportion by the media"; a phrase that would also apply to Fukushima.
"With 200,000 reactors we should expect to see around 40 of them blow up every year."
But only if we were really, really bad at maths, and decided to extrapolate in a straight line for no good reason.
"No thanx. I'll continue to reduce my consumption thank you."
No-one is suggesting you should do otherwise; it makes good sense to do more than one thing to approach this problem. Replacing the current technology with one that is a couple of orders of magnitude safer and cleaner than coal does, however, seem like a wise companion to reduction of consumption.
At the end of the day, the question of whether nuclear power is 'safe' or 'clean' in some absolute sense is irrelevant; what matters is that it is demonstrably far safer and cleaner than the current coal-burning technology. If fission power was invented today, without all the historical baggage from the cold war, those calling for carbon footprint reduction would be clamouring to have coal power plants replaced by nuclear plants as soon as possible. It would save lives, and reduce not only carbon pollution, but also sulphur, particulates and even radiological pollution too.