Category I
| 235U | 5 kg |
| 233U | 2 kg |
| 239Pu | 2 kg |
| .4×235U+233U+239Pu | 2 kg |
Category I is strategic special nuclear material.
- Uranium-235 (contained in highly enriched uranium: >20% or more 235U),
- Uranium-233, or
- Plutonium-239.
Category I, SSNM means SSNM in any combination in a quantity of
- 2 kilograms(4.4 pounds) or more of Pu-239; or
- 5 kilograms or more of U-235(11 pounds) (contained in uranium enriched to 20 percent or more in the U-235 isotope); or
- 2 kilograms(4.4 pounds) or more of U-233; or
- 5 kilograms(11 pounds) or more in any combination computed by the equation grams = (grams contained U-235) + 2.5 (grams U-233 + grams Pu-239).
This is often referred to as a formula quantity.
Read more about this topic: Special Nuclear Material
Famous quotes related to category i:
“I see no reason for calling my work poetry except that there is no other category in which to put it.”
—Marianne Moore (1887–1972)