[T@T]

Originally Posted by blankall

It's actually can be done.

Nuclear forensics it's called:

http://cisac.stanford.edu/events/nuc..._an_explosion/

Each reactor should leave a signature on the nuclear material in its processing. It can't be done with 100% certainty, but it is possible.

I wouldn't be very confident that nuclear forensics would work with a "dirty" bomb, Remember,you don't need weapons grade Uranium to make one. Iran probably could make one right now with enough of the radioactive material cesium-137 to send most of population of Israel running for 50 years and it's doubtful it could be tracked to an Iranian reactor.