Nuclear power looks cheap on paper because the costs are hidden because the costs were are borne, not by the nuclear power "industry", but by the taxpayer. The United States' nuclear power "industry" is actually a beneficial byproduct of the U.S.'s nuclear arms race with the (then) Soviets.
Also, unlike gas, oil, coal, or renewable plants, the total cost of a nuclear power plant cannot be determined until AFTER the plant has been closed, because on top of dealing the spent fuel, the plant itself must be carefully dismantled and interred, which is both costly and labor-intensive.
It's like having a mortgage with a massive balloon payment that must be paid after the house is knocked down (then you still have to keep paying to store the debris, because it's hazardous).
Nuclear is NOT a good energy solution, because of reasons that have nothing to do with the typical hippy "no nukes"-things, NOR is it a reason to stop support for renewable sources.