Largely via opposition to nuclear weapons, and some cost-benefit analysis which assumes nuclear proponents are too optimistic about both costs and risks of nuclear power (further reading). Personally I think this was pretty reasonable in the 70s and 80s. At this point I’d personally prefer to keep existing nuclear running and build solar panels instead of new reactors, though if SMRs worked in a sane regulatory regime that’d be nice too.
Largely via opposition to nuclear weapons, and some cost-benefit analysis which assumes nuclear proponents are too optimistic about both costs and risks of nuclear power (further reading). Personally I think this was pretty reasonable in the 70s and 80s. At this point I’d personally prefer to keep existing nuclear running and build solar panels instead of new reactors, though if SMRs worked in a sane regulatory regime that’d be nice too.