I see reports about the Iranian bombings saying that there’s been no detection of an increased amount of atmospheric radiation in the area (according to the IAEA).
I also see one report which claims that all the nuclear materials were moved to a secondary location (according to Iran).
I’d be relatively dubious of the second claim if it wasn’t for the first. If there was a sizable amount of nuclear material in an underground bunker, would a successful bombing run release a notable quantity of radioactive dust and contaminants into the atmosphere, or would it be contained?
Deep underground ‘boom’ + that boom happening above the radioactive goods, just collapsing the roof on to it may not release any noticeable spike. But that’s only one facility of three, the others were not so hardened and I would expect a release from them.
I was assuming that the expectation of detectable radiation was due to the stockpile of waste uranium-hexaflouride. It sublimates at 56 C. So if it were stored at any of the facilities, bombing would be expected to churn a lot up and it would be detectable. Even though it is considered depleted in terms of its fissile capacity, it is still almost as radioactive as the base unenriched form.
In addition, there is possibly a lot of highly enriched uranium-hexaflouride around, basically ready for the last enrichment pass before processing to metallic form. Again, that would be expected to be easily released into the atmosphere. But that you would expect to have been very carefully protected. Not the least because with so many fluorine atoms, it is seriously nasty.
I figure they may have moved the uranium, but the important target was always the centrifuges and their associated infrastructure, not the uranium itself.