All excellent questions, these should be addressed every time nuclear is considered. I'm not sure existing nuclear is all that competitive with renewables+stor

All excellent questions, these should be addressed every time nuclear is considered. I'm not sure existing nuclear is all that competitive with renewables+storage, but better designs absolutely could be. Better designs also wouldn't produce long-lived waste, and could also transmute existing long lived waste into short term. This will require R&D. Increasing the number of wind turbines increases the risk of collisions with aircraft. What level of risk is acceptable to you? That's the question, not "will there be any increase in risk at all".