[TXnMA]

If all those centrifuges were spun up and full of UF₆, then even a minor shockwave could have caused serious chaos. Yet, there are reports that several levels of the underground facility may have collapsed.

If there has been major collapse, the Iranians should forget rescue. (Forget radioactivity in the short term; Uranium hexafluorde is nasty stuff, chemically.) Those trapped people (including the visiting Norks) underground are already dead or doomed.

Iran should be busting their humps bringing in cement trucks to seal off as much of the radioactive contamination as possible -- and hope that there is no place a critical mass can accumulate.

[editor-surveyor]

Cement trucks will only result in more tons of radio active debris to dispose of; the Russians found that out at Chernoble. The concrete decomposes quickly under those conditions.