Core catchers do need emergency cooling working. Also, Fukushima had far more basic failures in far simpler safety features being lacking or absent.
No pressure-resistant containment to speak of.
No hydrogen recombinators.
No passive emergency cooling capacity or properly redundant active emergency cooling because of braindead placement of generators. A fish pond on a nearby hill would have helped, together with gravity...
Any later western reactor design has those. Look at TMI. Thats what it should have looked like, even without a core catcher. (granted, scenarios are not the same)
No pressure-resistant containment to speak of.
No hydrogen recombinators.
No passive emergency cooling capacity or properly redundant active emergency cooling because of braindead placement of generators. A fish pond on a nearby hill would have helped, together with gravity...
Any later western reactor design has those. Look at TMI. Thats what it should have looked like, even without a core catcher. (granted, scenarios are not the same)