Does that calculation include the cost of storing the nuclear waste after use? I'd be curious to see a reference for your claim.
You need to look up how much nuclear waste is actually produced. It's a minuscule amount relative to the energy produced, and it doesn't actually need more than to be transported and then encased in concrete.
Dry casting on site is fairly cheap.
The true cost of nuclear is the massive construction cost. We don't know how to solve that.