For air transport of radioactive materials, which packaging type is used to ensure containment, shielding, and safety at high altitude?

• A. Type C
• B. Type A
• C. Type B
• D. Type D

Answer: (A)

Air transport requires packaging that keeps the contents contained, shielded, and able to dissipate heat under the unique stresses of flight and possible accidents. Type C packaging is designed specifically for transporting radioactive material by air, providing robust containment, shielding, and thermal protection to meet the stringent requirements of high-altitude flight. This makes it the best choice when air shipment is involved and the material carries significant activity or risk.

Type A packaging is intended for lower activity and does not meet the higher protection needed for flight. Type B packaging is very robust and can be used for air transport as well, but the designation Type C signifies a package certified specifically for the most demanding air-transport scenarios. Type D isn’t a standard designation used for this purpose in common regulations.