Well sort of. Reliable base load power (nuclear, coal, gas, hydroelectric) has become essential to modern civilization in a way that transcends economics. If we can't keep the lights on then nothing else matters. Thus, competent governments will find ways to keep those plants running regardless of cost or environmental impacts. Those that don't will end up as failed states like what is happening to South Africa right now.
Maybe, but irrelevant. If the nuclear plant goes up in costs by 10x then you're just going to buy more fossil fuels. Ignoring costs associated with running and changing the nuclear plant that might cause you to run it anyway and just lose a ton of money. The backup answer is always fossil fuels more or less.
