What is the term used for the outer package that provides additional shipping protection for a Type B container?

The term used for the outer package that provides additional shipping protection for a Type B container is "Overpack." An overpack serves to enhance the safety and security of the primary container during transportation, especially when dealing with hazardous materials like radioactive substances. This extra layer of packaging not only offers physical protection but also helps in ensuring compliance with regulations regarding the transport of hazardous materials.

In the context of shipping protocols, overpacks can facilitate the handling and storage of dangerous goods while also providing an additional barrier against environmental factors or external impacts. This is particularly important for Type B containers, which are specifically designed to transport radioactive materials. The overpack helps meet safety standards by ensuring that the primary container remains intact and that any potential leaks or spills are contained.

This term is specifically recognized in regulatory contexts, such as those established by the Department of Transportation (DOT) and the International Atomic Energy Agency (IAEA), highlighting its significance in the safe transport of hazardous materials.