No the problem was that 'proliferation risk' was used by the enemies of nuclear to oppose all these programs and get them canceled. Even when the main use of those reactors would have been to consume the nuclear waste from the existing PWR reactors demostically.

But sure lets kill a great program to build next generation reactors and solve the 'nuclear waste' 'problem' by preventing that.

Just another one of the many ways the public opposition to nuclear has prevented all the progress.