Genuinely impressed
On the one hand, it is a bit worrying when nuclear reactor buildings begin to pop off one after another and I can imagine many an anti-nuke green activists rubbing their hands at the thought of such a propaganda coup.
However, on the other hand, it is highly reassuring that after the largest quake on record and notwithstanding the huge explosions around them, the reactor pressure vessels are holding and no significant leakage and contamination is taking place.
People may say that the reactors are old and the technology is obsolete but what matters is that even this obsolete technology is capable of containing the cores in extreme circumstances.
Looking at the videos, these explosions were at least equivalent to a large conventional bomb each (minus the kinetic impact) so the fact that anything remains intact in the affected building is worthy of respect.