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David Rollins's avatar

Good call, Steven. You could be right about the Plutonium. I completely forgot about the Russian-built reactor Iran has. Apparently, Pu-239 is not readily extracted from that type of reactor, but Iran could have woven some after-market trickery into the back end (and probably has). As for the bomb-making potential of Pu-239, it still requires a high percentage of the fissile isotopes. Apparently, when it comes out of the reactor, at most it's around 70% pure. A quick dive into the sources says the fissile isotopes would have to be in excess of 93%.

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Steve Mullen's avatar

Common lore says that 90% enrichment of U-235 is "weapons grade." However, "Little Boy," in 1945 was considerably less. Around 50-60% ish. Wasn't a really good bomb, as nukes go today, but it worked. Made a heck of a mess. But, one other problem that I've never seen addressed: what about their plutonium? Surely they're harvesting that from their reactors, too. Pu-239 makes bombs.

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