政策法规现行有效美国危险品合规

§ 173.420 Uranium hexafluoride (fissile, fissile excepted and non-fissile).

效力	法规类型	发布日期	生效日期	发文机构
现行有效	部门规章	2026-08-07	2026-09-08	Code of Federal Regulations (CFR) - Transportation (Title 49)

发布08-07

生效09-08

摘要总结AI 辅助解读

该法规（49 CFR § 173.420）规定了六氟化铀（UF6）在美国境内运输的严格包装与申报要求。核心内容包括：超过0.1公斤的UF6必须使用符合ANSI N14.1标准或特定ASME标准的专用包装，且UF6必须以固态形式存在，填充率及压力有明确限制。法规区分了易裂变、非易裂变及豁免易裂变的UF6，分别对应不同的UN编号（UN 2977/2978）和名称。此外，小于0.1公斤的非易裂变/豁免易裂变UF6可按有限数量例外包装（UN 3507）运输。建议相关从业者核实包装合规性及申报分类。

(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).

- (2) Packagings must be designed, fabricated, inspected, tested and marked in accordance with—

(i) American National Standard N14.1 in effect at the time the packaging was manufactured; or

- (ii) [Reserved]

- (iii) Section VIII of the ASME Code (IBR, see § 171.7 of this subchapter), provided the packaging—

(A) Was manufactured on or before June 30, 1987;
(B) Conforms to the edition of the ASME Code in effect at the time the packaging was manufactured;
(C) Is used within its original design limitations; and
(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)

- (3) Each package shall be designed so that it will:

(i) Withstand a hydraulic test at an internal pressure of at least 1.4 MPa (200 psig) without leakage;

- (ii) Withstand the test specified in § 173.465(c) without loss or dispersal of the uranium hexafluoride; and

- (iii) Withstand the test specified in 10 CFR 71.73(c)(4) without rupture of the containment system.

- (4) Uranium hexafluoride must be in solid form.

- (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.

- (6) The pressure in the package at 20 °C (68 °F) must be less than 101.3 kPa (14.7 psia).

(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) Uranium hexafluoride not exceeding the limits specified in the limited quantity package limits column of table 4 in § 173.425 may be classified as UN 3507, Uranium hexafluoride, radioactive material, excepted package, less than 0.1 kg (0.22 pounds) per package, non-fissile or fissile-excepted, provided that:

- (1) The mass of uranium hexafluoride in the package is less than 0.1 kg (0.22 pounds); and

- (2) The conditions of §§ 173.24, 173.24a, and 173.421(a) and (d) are met.

(e) For a package containing 0.1 kg or more of UF 6 , the proper shipping name and UN number “Radioactive material, uranium hexafluoride, UN 2978” must be used for the transportation of non-fissile or fissile-excepted uranium hexafluoride and the proper shipping name and UN number “Radioactive material, uranium hexafluoride, fissile, UN 2977” must be used for the transport of fissile uranium hexafluoride.

[69 FR 3675, Jan. 26, 2004; 69 FR 55118, Sept. 13, 2004, as amended at 79 FR 40612, July 11, 2014; 80 FR 1162, Jan. 8, 2015; 80 FR 72928, Nov. 23, 2015]