alt Hacker NewsFor the few days without wind, natural gas is cheaper than nuclear. There is also biogas and hydro. Nuclear is not cheap to turn on off. Also, the insurance cost of nuclear power is not accounted for: basically, there is no insurance, and the state (the population) just have to live with the risk.
Natural gas emits CO2. The risks of climate change caused by CO2 utterly dwarf those of any nuclear reactor. Nuclear power in the US has the lowest deaths per joule of all of them.