§ 173.442 Thermal limitations.
发布08-07
生效09-08
摘要总结AI 辅助解读
美国联邦法规第49篇（运输）§ 173.442规定了Class 7（放射性物质）包装的热限制要求。该条款强制要求放射性物质包装在设计、构造和装载时，必须确保内部产生的热量不影响包装完整性，并严格限制在特定环境温度（38°C/100°F）下的外部表面温度：非专用使用（Non-exclusive use）不得超过50°C，专用使用（Exclusive use）不得超过85°C。此规定直接影响放射性货物的包装认证与运输合规性。
A package of Class 7 (radioactive) material must be designed, constructed, and loaded so that—
- (a) The heat generated within the package by the radioactive contents will not, during conditions normally incident to transport, affect the integrity of the package; and
- (b) The temperature of the accessible external surfaces of the loaded package will not, assuming still air in the shade at an ambient temperature of 38 °C (100 °F), exceed either—
- (1) 50 °C (122 °F) in other than an exclusive use shipment; or
- (2) 85 °C (185 °F) in an exclusive use shipment.