Document ID: chunk:federal_register_of_legislation:F2024L01024:front:0:p52
Version: federal_register_of_legislation:F2024L01024
Segment Type: other
Provision Reference: 
Character Range: 153231–156004

for use in composite structures and having a "specific modulus" of 3.18 x 106 m or greater and a "specific tensile strength" of 7.62 x 104 m or greater;
1. Gas centrifuges;
2. Complete rotor assemblies;
3. Rotor tube cylinders with a wall thickness of 12 mm or less, a diameter of between 75 mm and 650 mm, made from 'high strength‑to‑density ratio materials';
0. B. 001. b. 4. Rings or bellows with a wall thickness of 3 mm or less and a diameter of between 75 mm and 650 mm and designed to give local support to a rotor tube or to join a number together, made from 'high strength‑to‑density ratio materials';
0. B. 001. b. 5. Baffles of between 75 mm and 650 mm diameter for mounting inside a rotor tube, made from 'high strength‑to‑density ratio materials';
6. Top or bottom caps of between 75 mm and 650 mm diameter to fit the ends of a rotor tube, made from 'high strength‑to‑density ratio materials';
      7. Magnetic suspension bearings as follows:
a. Magnetic suspension bearings, specially designed or prepared, consisting of an annular magnet suspended within a housing made of or protected by "materials resistant to corrosion by UF6" containing a damping medium and having the magnet coupling with a pole piece or second magnet fitted to the top cap of the rotor;
b. Active magnetic bearings specially designed or prepared for use in gas centrifuges.
                       Note: Bearings specified by 0B001.b.7.b. usually have the following characteristics:
                            1. Designed to keep centered a rotor spinning at 600 Hz or more; and
                            2. Associated to a reliable electrical power supply and/or to an uninterruptible power supply (UPS) unit in order to function for more than one hour.
8. Specially designed or prepared bearings comprising a pivot‑cup assembly mounted on a damper;
9. Molecular pumps comprised of cylinders having internally machined or extruded helical grooves and internally machined bores;
10. Ring‑shaped motor stators for multiphase AC hysteresis (or reluctance) motors for synchronous operation within a vacuum at a frequency of 600 Hz or greater and a power of 40 VA or greater;
11. Centrifuge housing/recipients to contain the rotor tube assembly of a gas centrifuge, consisting of a rigid cylinder of wall thickness up to 30 mm with precision machined ends to locate the bearings and with one or more flanges for mounting;
12. Scoops consisting of specially designed or prepared tubes for the extraction of UF6 gas from within the rotor tube by a Pitot tube action and capable of being fixed to the central gas extraction system;

0. B. 001. b. 13. Frequency changers (converters or inverters) specially designed or prepared to supply motor stators for gas centrifuge enrichment, having