"Breeder technology"
...
"this is known technology and known physics - not some "pipe dream""
Please point to the commercial breeder reactors in operation today. Two were tried (outside of russia). Both were shut down due to economic unviability. The one in Japan produced power for one hour in two years of attempted operation. The one in India is supposed to go live Real Soon Now.
Don't make nuclear power decisions based on aspirational bullshit, and don't pretend commercial breeder reactors are an established thing. If you get a new nuclear power plant, it will be a fission reactor.