...nobody has thought of this before.
It makes a lot of sense, in a whole "why not?" sort of way...I don't see any reason why you couldn't build a sealed-package pebble-bed reactor that would fit on a flatbed truck, fit the cooling tower on a second truck, and just deploy it somewhere where you need lots of power.
Hell, combine it with solar power, and you can use the solar power for "home" use and the nuclear plant for "industrial" use (refrigeration of food, running wells, recharging electric trucks and farming equipment, tools, etc, etc). For some small towns in the United States alone, they could work a co-op setup where all the towns in a close area chip in to get the reactor, giving them enough power to do things. Oh, and sweat equity in setting up the power wires and such.
Or for military applications...a lot of gruff is being put into military technology such as diesel-electric hybrid drive for light armored vehicles, the increasing need of electronic systems on the modern battlefield, and keeping the batteries charged for all the gadgets that American soldiers carry. Probably in 10-15 years, military units will probably mount fixed high-energy lasers and railguns for anti-artillery/missile defense in major firebases. The time will come when the power is needed...
There are a lot of options out there, and maybe this will be what, in some places, allows locations to become civilized.