What does TI stand for in the context of packaging of radioactive materials?

• A. Containment Index
• B. Criticality Safety Index
• C. Activity
• D. Transport Index

Answer: (D)

The main idea here is how we quantify the radiation level from a packaged radioactive material during transport. TI stands for Transport Index. It represents the maximum dose rate at one meter from the surface of the package, typically measured in millisieverts per hour (mSv/h), and the TI value is used to classify and control how the package is transported. This helps determine appropriate packaging, handling, and route restrictions to ensure safety.

The other terms don’t fit this context: Activity is the total amount of radioactivity present, not the external dose rate at 1 meter; Criticality Safety Index relates to preventing a nuclear chain reaction with fissile material and is not about transport dose rates; Containment Index isn’t a standard term used for this purpose.