How would we build 150 reactors today? We would get together "industry leaders" to consult, who would suggest half of that be some non-nuclear nonsense to line their pockets, then we would provide incentives to companies written by those companies with loopholes, would take that money and make half assed attempts that allow them to keep the largest portion of taxpayer money possible with the least effort, and then abandon their efforts to shell companies embroiled in lawsuits.
Little would get done at the cost of massive amounts of public money flowing into private hands. This is by design, and its the only thing politics is aligned to do. When it works out in some area, it's fluke for the system and fortune in a sea of failure for the people of the nation.