§ 173.410 General design requirements.
发布08-07
生效09-08
摘要总结AI 辅助解读
本条款规定了美国运输部（DOT）对7类放射性物质包装容器的通用设计要求。除满足基础合规要求外，包装必须具备易于搬运和固定、吊耳安全系数至少为3、表面无突出物且易去污、防止积水等物理特性。特别针对航空运输，明确了表面温度限制（50°C）、极端温度下的完整性保持以及液体包装的耐压标准。该规定直接约束放射性货物包装制造商及托运人，是危险品出口至美国或经美转运的核心技术门槛。
In addition to the requirements of subparts A and B of this part, each package used for the shipment of Class 7 (radioactive) materials must be designed so that—
- (a) The package can be easily handled and properly secured in or on a conveyance during transport.
- (b) Each lifting attachment that is a structural part of the package must be designed with a minimum safety factor of three against yielding when used to lift the package in the intended manner, and it must be designed so that failure of any lifting attachment under excessive load would not impair the ability of the package to meet other requirements of this subpart. Any other structural part of the package which could be used to lift the package must be capable of being rendered inoperable for lifting the package during transport or must be designed with strength equivalent to that required for lifting attachments.
- (c) The external surface, as far as practicable, will be free from protruding features and will be easily decontaminated.
- (d) The outer layer of packaging will avoid, as far as practicable, pockets or crevices where water might collect.
- (e) Each feature that is added to the package will not reduce the safety of the package.
- (f) The package will be capable of withstanding the effects of any acceleration, vibration or vibration resonance that may arise under normal conditions of transport without any deterioration in the effectiveness of the closing devices on the various receptacles or in the integrity of the package as a whole and without loosening or unintentionally releasing the nuts, bolts, or other securing devices even after repeated use (see §§ 173.24, 173.24a, and 173.24b).
- (g) The materials of construction of the packaging and any components or structure will be physically and chemically compatible with each other and with the package contents. The behavior of the packaging and the package contents under irradiation will be taken into account.
- (h) All valves through which the package contents could escape will be protected against unauthorized operation.
- (i) For transport by air—
- (1) The temperature of the accessible surfaces of the package will not exceed 50 °C (122 °F) at an ambient temperature of 38 °C (100 °F) with no account taken for insulation;
- (2) The integrity of containment will not be impaired if the package is exposed to ambient temperatures ranging from −40 °C (−40 °F) to + 55 °C (131 °F); and
- (3) A package containing liquid contents must be capable of withstanding, without leakage, an internal pressure that produces a pressure differential of not less than the maximum normal operating pressure plus 95 kPa (13.8 psi).
[Amdt. 173-244, 60 FR 50307, Sept. 28, 1995, as amended by Amdt. 173-244, 61 FR 20750, May 8, 1996; 64 FR 51919, Sept. 27, 1999; 79 FR 40611, July 11, 2014]