Nuclear. Did I mention that in the UK, both our own govt. in tandem at times with France and China have tried to come up with a new nuclear power plant? They got so much ground broken and then it appeared to abort because costs were soaring beyond any quoted figures before the work properly began. Nuclear, to be safe and useful, and its waste to be safely dispose of, is a friggin' nightmare and not the stroll down easy street its advocates think. It's no panacea to me, it's a nightmare waiting for folks to fall asleep. And really, it seems to be that worse than the immediate effects of a catastrophe at work, the greater danger is the waste material that remains toxically active for thousands of years.
All of that ignores the terrorist target aspect of such a structure. You may remember the international chaos that was caused at Heathrow, I think, by a drone incident a few months ago? All the money riding on transport, and they still were powerless to find a civilian with a radio control. Yeah, living downhill of a big dam can be just as unsettling, but the one danger does not negate the other.
Rob, this is all BS!
Nuclear power plants are expensive because of the regulations, period. That is why they have become too expensive to build. A second, yet smaller issue, is nothing has been standardized yet; they are all one off designs. This is mainly due to the fact that not enough of them have been built yet for a standard to develop, which brings us back to the first issue.
Second, in the event of a meltdown, the containment dome holds in all of the radiation. To this date, aside from Chernobyl, which had no containment dome, all of the destruction and death from any nuclear plant malfunction was a direct result of mass hysteria. There was never, nor has there been, any threat from the radiation in any event other then Chernobyl. Also, the threat from Chernobyl was much less then what people have been told. Like I said before only about 120 people have died from radiation exposure at Chernobyl.
Third, nuclear waste is not as dangerous as people make it out to be. It is a solid. It can not spill out and flow all over the place. It would remain where ever it happened to land. Anyway, the short term containers are incredibly well built and it would take an severe action to break them. So it is highly unlikely the waste would somehow be exposed. On top of that, nuclear power produces an extremely small amount of waste that is completely contained somewhere. Uranium is extremely energy dense, so much so that you would only use up about a soup can size amount of it in your entire life if you only ever used nuclear for all of your energy. Any other base line power source produces significantly more waste per capita and almost all of it is released into the atmosphere in the form of carbon emissions.
Forth, nuclear power plants are a really really, and I mean really, bad terrorist target. The fuel rods are only, at most, 20% radioactive material, but I think most are only 5%. Point being, you cant make a nuclear bomb with it because you need 99% or higher fissionable material to do so. So, it makes no sense to try and steal it for that purpose. Using it in a dirty bomb would not do anything either since the explosion would spread the material so far apart fission would nearly stop. You can actually safely handle the pellets in the fuel rods safely by themselves. Insofar as exposing the core, the domes are built so thick not even a nuclear bomb can rupture them, and even if it did, the bomb would produce a much bigger problem then exposing the core would. Stealing the short term waste containers also would not be practical since they are so big and heavy. Trying to blow them up is also nearly impossible. To quote Richard Brant, it would have to be a really stupid terrorist to try and attack a nuclear power plant. There are a lot better and significantly softer targets to worry about.
Last your comment about the drone, intentionally or not, is nothing but a red herring. The reason a drone poses so much threat to an airport is because it could fly into a plane engine and bring it down. However, no drone is going to be able to destroy a containment dome or a temporary nuclear waste container at a nuclear power plant. This is not even a comparison worth thinking about.