A big piece of tungsten carbide properly shaped with a guidance device attached dropped at high speed would go through that containment dome, the reactor core, and right on down through the floor to damn near bedrock before it stopped.
No explosives needed... a kinetic kill has a beauty all its own.
Kinetic kill is interesting, but do the Israelis have it, and especially the precision to strike the target with essentially zero error? Sorry, but I’m not optimistic that Obama would share that technology with the Jews just to save the free world, if Israel doesn’t already have that capability.