These aren't nuclear power plants. They're designs of nuclear power plants. None have been constructed (well, aside from old plants like Superphenix, which was a failure, so much so that the French have mothballed their fast reactor program.)
Moreover, they would be considerably more expensive than existing plants (especially if fuel is to be reprocessed), so they're nonstarters.
Moreover, they would be considerably more expensive than existing plants (especially if fuel is to be reprocessed), so they're nonstarters.