Price per KW generated.
Nuke is at the bottom of the scale. It's the cheapest.
Hydro power. But it has it's drawn backs too. During the day, they product power. Some of the small hydro plants will pump water back up during the night to refill the lake. Bet you didn't know that. You can't count on hydro during a drought either.
Natural gas fired combine cycle power plants are next. I retired from one. A 700MW plant costs about 700 million and 2 years to build.
Coal fire next. At one time. Coal was cheaper then natural gas until Obombo declared war on coal. First Energy shut down 2 plants near me. Duke Energy sold their Ohio based plants to Dynegy. (I was in that sell) So that they didn't have to take responsible to shut down the 11 coal plants. It's in Dynegy's pocket now to retire them. A couple of them already been retired.
Renewables (solar and wind) are the most expensive to produce power. MW for MW they can't complete. Take away the tax rebates. And they would close their doors. Wind mills are labor intensive to maintain. Solar doesn't produce when it's raining, snowing and cloudy. Wind only produces power within a narrow band of wind speeds. Too little or too much, forget it. No power.
The big thing about building new power plants is the NIMBY groups. They don't want anything in their back yard. Then they bitch about the high prices that they have to pay,
