Nuclear Plant

The Nuclear Plant is the least efficient and easy way of getting electricity. It runs on uranium rods, which are crafted from uranium and sodium in the Uranium Enrichment building, meaning the coin cost to operate it is astronomical. A given amount of rods are consumed to provide 20 energy for a given amount of time; upgrading the building means the rod cost for each time goes down (the cost is multiplied by 0.75 each time the plant is upgrade). The table for run time and uranium rods it takes are shown here, respectively.

A fully fed Uranium Enrichment floor (using a drone to directly mine the uranium) will produce 3 rods every 2 minutes, or 90 per hour; this means you cannot enrich enough uranium to keep the plant running. Further, 20 L9 mines provide the maximum uranium you can dig up - which only feeds 2 of the enricher's 3 stations. This means you need a directly mining drone to keep your enricher fed, which will provide 27 rpm of the 30 you need - you will need at most 2 L9 mines or 3 L7 mines to dig up the remaining uranium. This costs 0 to 4 electricity. If you don't do it, you'll only make at most 60 rods per hour, which is less than half of what you need to run the plant, even at maximum efficiency.

As you can see above and below, the coin costs to build and run the plant are also unconscionable; it is far cheaper to make an L20 Wind Turbine and an L10 Solar Plant, and simply turn some things off if you need temporary electricity.