The technical ramp up/down issue is often conflated with amortized capital cost. Nuclear, in order to provide electricity at a competitive rate, needs >90% cap

The technical ramp up/down issue is often conflated with amortized capital cost. Nuclear, in order to provide electricity at a competitive rate, needs >90% capacity factor. That means it can't ramp up/down and stay in business, not that it can't ramp up/down. Since the fuel is trivially cheap, ramping down does not provide any economic savings. The opposite is true for an CCGT plant. ... and that is the fundamental reason why there isn't any pressure to build new nuclear in the US (I am less familiar with PPAs and grid regulation in the EU).