At 3:45 in Paul Gunter director of the reactor oversight project at Beyond Nuclear: Indications are right now that the reactor structures themselves have been breached.
It’s very likely that some of the radioactive material — the melted cores — have moved into the earth.
So it’s beyond containment right now.
I think that’s the tragedy that we see unfolding as Fukushima’s radioactive water crisis is only beginning. [...]