The two largest deposits of uranium in the world are located in Canada and Australia. How are those places geopolitically unstable?
Also, there hasn't been any disruptions, both minor and major, in nuclear transport in the last 4 decades, which is difficult to say for any other power source, green power included. Also, uranium is the second most common element in the world, after silicone. Lastly, because of the sheer number of regulations, uranium transport and nuclear facilities are among the best guarded things known to man.
You know what's even better? Even with all this red tape, nuclear power can make a significant profit WITHOUT government subsidies, taxes, or anything of the sort. Modern CANDU reactors are practically impossible to disrupt as well, being automated to shut down at the smallest amount of trouble.
Also, how much damage do you think a couple of trucks carrying nuclear waste would do if they were hijacked and their contents sprayed across the landscape? What kind of terrorist has such small aims? The radioactive content of nuclear waste may be relatively high, but seriously, it's effects would be hardly noticeable (think a couple hundred x-rays) unless NO ONE did anything and let the radioactive waste sit there for years. They couldn't use it as weaponized nuclear arms either, because they aren't refined for that purpose.
Let me illustrate. Uranium is equivalent to 500 megawatts of energy per cubic meter. Only 3% of this becomes nuclear waste. As a comparison, 14 massive wind turbines located on a windy mountainside will generate 30 megawatts. To further illustrate, a uranium fuel pellet the size of your fingernail will generate more power than a sack of firewood. That entire sack of firewood becomes pollution whereas only 3% of that pellet becomes something we can effectively measure, control, and see. We can't control carbon dioxide emissions considering we don't even know with accuracy how much gets released.