Yeah.
My guess is that the explosives'd go, but because there'd be no control over the way they went, the nuclear reaction wouldn't start - so you'd just end up with a lump of fissile material sitting in there slowly melting.
I'd dispute the bit about the particularly radioactive volcano, though: possibly depending on where it is, there'd already be all kinds of radioactive stuff in the magma; and there's really not very much in a bomb. So any difference it makes'd be marginal - a couple of kilos mixed in however many thousand tonnes there is of magma is pretty small beer.
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Enzyme is powered by sunlight, Sun 15 Jul 2012, 15:06,
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