The biggest problem with nuclear is making the numbers work. You end up paying something like 80% of the cost 1 GW/year * 50 years before you get your first cent in revenue. That's a very tough thing to finance. Cost and especially time overruns during construction can easily tank the project financially. About the only way to make it work is to be a regulated utility that has a long term captured audience for its power. One that's very likely to be the same size or bigger for the next half century. Even there you still have to worry about technological change pulling the carpet out from under you in 20 or 30 years.
That's leaving aside the questions of insurance, local and federal regulatory approval, and waste disposal / decommissioning costs.
That's leaving aside the questions of insurance, local and federal regulatory approval, and waste disposal / decommissioning costs.