HMR Radioactive Materials
The proper label to affix to a package of Class 7 radioactive material is based on the transport index, or "TI," and the maximum radiation level at any point on the external surface of the package. The transport index is the single number assigned to a package, overpack, or freight container to provide control over radiation.
If the radiation level and TI suggest different hazard warning labels, choose the label indicating the greater hazard level. RADIOACTIVE WHITE-I indicates the least severe hazard level, while RADIOACTIVE YELLOW-III indicates the most severe. Any package containing a highway route-controlled quantity must always be labeled RADIOACTIVE YELLOW-III.
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