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What Exactly IS The Transportation Index?

August 17th, 2017 by Natalie Mueller

Filed under: Industry News

There are a number of decisions and calculations involved in the safe transportation of potentially dangerous radioactive materials. Along with considerations such as selecting the right containers (our 7A Type A Drums are great choice for many of these shipping solutions), a crucial rating is the Transportation Index (TI).

Despite its importance, it’s easy to lose the definition of the Transportation Index (TI) among the deluge of terminology, ratings, and regulations. It’s a daunting task to keep track of it all. If you see “TI”, and know that it means “___ sticker goes on the drum,” but would like to fully understand what the term refers to, here is a quick explainer:

The TI is a measurement of radiation that is considered when shipping radioactive material. It does not, however, reflect any relationship with a human body or any maximum safe dose regulations. Rather, it is the measurement of the maximum dose of radiation you would receive one meter away from a package containing radioactive material.

This measurement is then utilized in conjunction with the metrics that establish which colored label a container requires. If a container has a white “Radioactive I” label, no Transportation Index is necessary because these packages produce a negligible reading at one meter. For a package with a yellow “Radioactive II” label, the TI must not exceed 0.01 mSv h-1, and packages with a yellow “Radioactive III” label have a TI that exceeds 0.01 mSv h-1.

There are additional rules for packages that are shipped together. In general, if multiple radioactive packages are being transported together in a common carrier vehicle, the sums of the TIs for all packages must not exceed 0.5 mSv h-1. However, if the vehicle is being used exclusively for the transport of radioactive material, the TI allowances are increased.

These are only a few of the rules and regulations that use the transportation index as a factor. Always consult with the Department of Transportation to make sure you’re fully compliant. However, we hope this helps provide some clarity as you navigate the rules surrounding shipping radioactive materials. Armed with the right information, and perhaps a Skolnik 7A drum, should make the task less intimidating.

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