Renewables are sold over the border more because they are naturally geographically distributed. I want to see nuclear on the grid as a power source of last resort, so we can destroy the fossil fuel infrastructure, yet keep civilization running if a volcano blocks out the sun or climate change turns the deserts cloudy, or who knows what the future holds.

Fossil fuels are incredibly subsidized, both explicitly and through unpriced externalities. If we must subsidize the alternative, then so be it. Nuclear should get cheaper as we build more.

Most nuclear plants today will melt down if left unattended. That's pretty stupid. We should let engineers make them orders of magnitude safer, with passive air cooling or huge water reserves, so they can be insured at reasonable cost. There is no shortage of ideas on that front.