Here is the rub: conventional power plant design needs an external power supply for normal work, to keep up circulation (emergency generators are good enough for just that, emergency shutdown). Gravity might be used, and both the EPR and pebble-bed designs rely on it in case of emergency, but other technical problems come with the basic idea of those solutions.

*Traitor*, n.
A benighted individual who perceives an illusory distinction between serving his nation and abetting the criminals who govern it.