It can be cheaper to run a nuclear plant than a conventional power plant, due to lower fuel costs. But what kills nuclear is the capital costs of building the plant. It takes a while to reap the reward
Does that calculation include the cost of storing the nuclear waste after use? I'd be curious to see a reference for your claim.
I'm talking about capital costs, not operating costs. $3B/GW for a coal plant is about 5X as much as natgas.