Part ANNEX II TABLE: CATEGORIZATION OF NUCLEAR MATERIAL

Material	Form	Category I	II	III^f1
(a) All plutonium except that with isotopic concentration exceeding 80% in plutonium−238.
(b) Material not irradiated in a reactor or material irradiated in a reactor but with a radiation level equal to or less than 100 rads/hour at one metre unshielded.
(c) Quantities not falling in Category III and natural uranium should be protected in accordance with prudent management practice.
(d) Although this level of protection is recommended, it would be open to States, upon evaluation of the specific circumstances, to assign a different category of physical protection.
(e) Other fuel which by virtue of its original fissile material content is classified as Category I and II before irradiation may be reduced one category level while the radiation level from the fuel exceeds 100 rads/hour at one metre unshielded.
1 Plutonium ^f2	Unirradiated ^f3	2 kg or more	Less than 2 kg but more than 500 g	500g or less but more than 15 g
2 Uranium −235	Unirradiated -uranium enriched to 20% 235U or more	5 kg or more	Less than 5 kg but more than 1 kg	1 kg or less but more than 15g
-uranium enriched to 10% 235U but less than 20%		10 kg or more	Less than 10 kg but more than 1 kg
-uranium enriched above natural, but less than 10% 235U			10 kg or more
3 Uranium −233	Unirradiated	2 kg or more	Less than 2 kg but more than 500 g	500g or less but more than 15 g
4 Irradiated fuel			Depleted or natural uranium, thorium or low-enriched fuel (less than 10% fissile content) ^f4 ^f5

Annotations

Footnotes

f1

(c)

Quantities not falling in Category III and natural uranium should be protected in accordance with prudent management practice.

f2

(a)

All plutonium except that with isotopic concentration exceeding 80% in plutonium−238.

f3

(b)

Material not irradiated in a reactor or material irradiated in a reactor but with a radiation level equal to or less than 100 rads/hour at one metre unshielded.

f4

(d)

Although this level of protection is recommended, it would be open to States, upon evaluation of the specific circumstances, to assign a different category of physical protection.

f5

(e)

Other fuel which by virtue of its original fissile material content is classified as Category I and II before irradiation may be reduced one category level while the radiation level from the fuel exceeds 100 rads/hour at one metre unshielded.