jwiner
River - I am not very well informed on nuclear power... One concern that comes to mind is the tremendous amount of fresh water required for cooling... We are running out of fresh water faster than we are running out of oil! Ya gotta love steam as the only emission though (as long as there isnt a melt down!)
You actually dont need freshwater, the ones on the coast are cooled by sea water. Most major cities are built on major bodies of water (oceans, very large lakes, and huge rivers). Many nuc plants dont have the huge cooling towers you see in the images, they pump water in and then back out. In a large body of water or river they do not affect the overall temperature except in the immediate area of the discharge. The cooling water never is in contact with anything contaminated so it is exactly what went in, just a little warmer...coolant discharges on the ocean are actually great fishing spots since they are rich in algae and plankton which baitfish are attracted to, which in turn attracts predators.
Remember a nuc plant operates on the same principle as a coal plant or oil plant, the only difference is what provides the heat. Both use steam turbines to power the generators and that steam has to be condensed in either a condensor on a body of water or in a large cooling tower. Gas turbine plants (natural gas) dont require steam gens but they are usually built with them otherwise they would be wasteful because all the heat content of the exhaust gases would just go in to the air.
New plants are passively safe, meaning you could know exactly how to operate the plant and purposely attempt to cause a meltdown and it wouldnt allow it. This is not done by computers in the new plants, its done by the design of the phyical plant (hydrodynamics beyond all but very geeky peoples understanding).
Also fuel can be reprocessed, this returns about 95% of the energy back to the fuel. Imagine filling your car with gas, but 95% of what goes into the engine can be use again. So after you put 10 gallons to fill your car you only ever have to put another half gallon in to top it off after you drive 300 miles. This also drastically reduces the waste produced...but its not all that popular since it does have a few nasty left overs when you reprocess. Namely weapons grade plutonium.
Interesting note on peoples perception that nuclear power plants are bad for people that live nearby. Did you know that people living near coal-fired power plants are exposed to significantly higher radiation doses than those living near nuclear power plants that meet government regulations (close to 100X). Since coal contains uranium, thorium, and other radiological elements when it burns some goes into the air and the rest goes into the ash that is collected.
Hows this for scary, coal plants actually release more uranium into the environment in a year than is consumed in nuclear power plants. It is actually possible for coal ash to be refined for nuclear materials if someone really wanted to. So if some nut job has access to processing facilities but no uranium ore, all he needs is a real lot of coal ash which people would probably gladly give him since its a waste product.