What is the maximum acceptable transport index (TI) of a package in mR/hr?

The maximum acceptable transport index (TI) of a package is crucial for ensuring the safety of transporting radioactive materials. The transport index essentially indicates the level of radiation exposure at a specific distance from the package, typically measured in millirems per hour (mR/hr). A transport index of 10 mR/hr reflects a threshold that is widely accepted in the transportation of certain categories of radioactive materials.

In the context of safety regulations and standards, a TI of 10 mR/hr is the maximum allowed for packages that are transported without any additional special controls. This level balances the need for transporting these materials safely while still allowing for their movement in commerce or for medical purposes. Going above this level could result in increased regulatory scrutiny, requiring stricter handling and storage protocols to minimize exposure to personnel and the public.

Other options represent either lower or higher levels, which would not align with the established guidelines for safe transport of radioactive goods. A transport index higher than 10 mR/hr may necessitate more stringent controls and operational procedures, including possibly requiring a designated transport vehicle or enhanced shipping manifests. Thus, a transport index of 10 mR/hr stands as the correct choice in this context.