Special Nuclear Material - Category II

Category II

Category II is special nuclear material of moderate strategic significance.

  • Less than a formula quantity of strategic special nuclear material but more than 1,000 grams of uranium-235 (contained in uranium enriched to 20 percent or more in the U-235 isotope) or more than 500 grams of uranium-233 or plutonium-239, or in a combined quantity of more than 1,000 grams(2.2 pounds) when computed by the equation grams = (grams contained U-235) + 2 (grams U-233 + grams Pu-239); or
  • 10,000 grams(22 pounds) or more of uranium-235 (contained in uranium enriched to 10 percent or more but less than 20 percent in the U-235 isotope).

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