Transport Index (TI) 1
Transport Index (TI) 1 : A number assigned to a package, overpack or freight container, or to unpackaged LSA-I or SCO-I, which is used to provide control over radiation exposure. The value of the transport index for a package or overpack is used (with the surface dose rate) in determining the category (I-WHITE, II-YELLOW or III-YELLOW) to which the package or overpack belongs, and hence which requirements are applicable to its transport. A package or overpack with a transport index greater than 10 can be transported only under exclusive use. The procedure for calculating a transport index is given in paras 526and 527 of the 2005 Edition of the IAEA Regulations for the Safe Transport of Radioactive Material. In essence, the transport index is the maximum dose rate 1 m from the outer surface of the load, expressed in mrem/h (or the value in mSv/h multiplied by 100), and in specified cases multiplied by a factor between 1 (for small sized loads) and 10 (for large sized loads)
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