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What is the difference between medicine grade, energy grade, and weapons grade uranium?
Question
#125183. Asked by houston1127. (Feb 19 12 4:39 PM)
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MikeMaster99

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The relative proportion of the highly unstable 235U isotope. It's natural abundance is only 0.7% (i.e. of every 1000 U atoms, only 7 will be 235U.
http://en.wikipedia.org/wiki/Enriched_uranium Sorry, should have added:
Nuclear fuel is bout 3-4% 235U, while weapons grade is up to 90% 235U. Highly enriched uranium processing plants are used to create medical isotopes but these are not uranium isotopes themselves but some of the decay products.
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