173.420—Uranium hexafluoride (fissile, fissile excepted and non-fissile).
(a)
In addition to any other applicable requirements of this subchapter, quantities greater than 0.1 kg of fissile, fissile excepted or non-fissile uranium hexafluoride must be offered for transportation as follows:
(1)
Before initial filling and during periodic inspection and test, packagings must be cleaned in accordance with American National Standard N14.1 (IBR, see § 171.7 of this subchapter).
(ii)
Specifications for Class DOT-106A multi-unit tank car tanks (see §§ 179.300 and 179.301 of this subchapter); or
(D)
Has shell and head thicknesses that have not decreased below the minimum value specified in the following table:
| Packaging model | Minimum thickness; millimeters (inches) |
|---|---|
| 1S, 2S | 1.58 (0.062) |
| 5A, 5B, 8A | 3.17 (0.125) |
| 12A, 12B | 4.76 (0.187) |
| 30B | 7.93 (0.312) |
| 48A, F, X, and Y | 12.70 (0.500) |
| 48T, O, OM, OM Allied, HX, H, and G | 6.35 (0.250) |
(i)
withstand a hydraulic test at an internal pressure of at least 1.4 MPa (200 psi) without leakage;
(ii)
withstand the test specified in § 173.465(c) without loss or dispersal of the uranium hexafluoride; and
(5)
The volume of solid uranium hexafluoride, except solid depleted uranium hexafluoride, at 20 °C (68 °F) may not exceed 61% of the certified volumetric capacity of the packaging. The volume of solid depleted uranium hexafluoride at 20 °C (68 °F) may not exceed 62% of the certified volumetric capacity of the packaging.
(b)
Each packaging for uranium hexafluoride must be periodically inspected, tested, marked and otherwise conform with the American National Standard N14.1.
(c)
Each repair to a packaging for uranium hexafluoride must be performed in accordance with the American National Standard N14.1.
(d)
Non-fissile uranium hexafluoride, in quantities of less than 0.1 kg, may be shipped in packaging that meets §§ 173.24, 173.24a, and 173.410.
[69 FR 3675, Jan. 26, 2004; 69 FR 55118, Sept. 13, 2004]