(a) For Category III materials, storage within an area to which access is controlled;
(b) For Category II materials, storage within an area under constant surveillance by guards or electronic devices, surrounded by a physical barrier with a limited number of points of entry under appropriate control or any area with an equivalent level of physical protection;
(c) For Category I material, storage within a protected area as defined for Category II above, to which, in addition, access is restricted to persons whose trustworthiness has been determined, and which is under surveillance by guards who are in close communication with appropriate response forces. Specific measures taken in this context should have as their object the detection and prevention of any assault, unauthorized access or unauthorized removal of material.
2. Levels of physical protection for nuclear material during international transport include:
(a) For Category II and III materials, transportation shall take place under special precautions including prior arrangements among sender, receiver, and carrier, and prior agreement between natural or legal persons subject to the jurisdiction and regulation of exporting and importing States, specifying time, place and procedures for transferring transport responsibility;
(b) For Category I materials, transportation shall take place under special precautions identified above for transportation of Category II and III materials, and in addition, under constant surveillance by escorts and under conditions which assure close communication with appropriate response forces;
(c) For natural uranium other than in the form of ore or ore-residue, transportation protection for quantities exceeding 500 kilograms U shall include advance notification of shipment specifying mode of transport, expected time of arrival and confirmation of receipt of shipment.
IN WITNESS WHEREOF, the undersigned, being duly authorized, have signed this
Convention, opened for signature at Vienna and at New York on 3 March 1980.
| ANNEX II | ||||
|---|---|---|---|---|
| TABLE: CATEGORIZATION OF NUCLEAR MATERIAL | ||||
| Category | ||||
| Material | Form | I | II | III3 |
| 1. Plutonium1 | Unirradiated2 | 2 kg or more | Less than 2 but more than 500 g | 500g or less but more than 15 g |
| 2. Uranium-235 | Unirradiated2--- | |||
| --uranium enriched to 20% U 235 or more | 5 kg or more | Less than 5 kg but more than 1 kg | 1 kg or less but more than 15 g | |
| --uranium enriched to 10% U 235 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% U 235 | ----- | ----- | 10 kg or more | |
| 3. Uranium-233 | Unirradiated2 | 2 kg or more | Less than 2 kg but more than 500 g | 500 g or less but more than 15 g |
| 4. Irradiated fuel | ----- | ----- | Depleted or natural uranium, thorium or low-enriched fuel (less than 10% fissile content).4, 5 | ----- |
1 All plutonium except that with isotopic concentration exceeding 80% in plutonium-238.
2 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.
3 Quantities not falling in Category III and natural uranium should be protected in accordance with prudent management practice.
4 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.
5 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.