[donttrustatoms]

"Fast reactors have always had this potential problem"

- Not really. Check out the dramatic experiments at EBR-II (fast reactor) demonstrating unprotected loss of coolant at full power. It shut itself down. Without damage. And started back up later that day, and operated that year, as a research reactor, with better uptime (capacity factor) than the fleet at the time.

[pfdietz]

That just shows that in that particular accident scenario the situation would not arise.