How does the Transport Index work? Which three TI classes, in ascending order of exposure rate, are there?
What is Transport Index? What are the 03 classifications of TI in increasing order of exposure rate?
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How does the Transport Index work? Which three TI classes, in ascending order of exposure rate, are there?
The Transport Index (TI) is a measure used in the transportation of radioactive materials to indicate the level of radiation exposure rate at a specified distance from the package containing the radioactive material. It is an important parameter for ensuring the safety of workers, the public, and the environment during the transportation of radioactive substances.
The Transport Index is expressed in units of microsieverts per hour (µSv/h) or millirems per hour (mrem/h), representing the radiation dose rate at a specific distance from the surface of the package. This distance is typically one meter (1 m) from the outer surface of the package.
There are three classifications of Transport Index in increasing order of exposure rate:
Low Transport Index (TI < 0.5): This classification indicates a low level of radiation exposure rate at a distance of one meter from the package. Materials with a low TI are considered to pose minimal radiation hazards during transportation. They may include items like certain laboratory samples, consumer products containing small amounts of radioactive materials, or medical diagnostic tools with low-level radioactive sources.
Intermediate Transport Index (0.5 ≤ TI < 50): Intermediate TI values represent a moderate level of radiation exposure rate. Materials with an intermediate TI may include radioactive sources used in medical treatments, industrial applications, or research activities. While precautions are necessary to ensure safe handling and transportation, the radiation hazards associated with materials in this category are typically manageable with appropriate shielding and safety measures.
High Transport Index (TI ≥ 50): High TI values indicate a significant radiation exposure rate at a distance of one meter from the package. Materials with a high TI may include highly radioactive sources used in industrial radiography, radiation therapy, or nuclear medicine procedures. Specialized handling procedures, shielding, and containment measures are required to transport materials with a high TI safely, and strict regulatory requirements govern their transportation to minimize radiation risks to workers and the public.
By classifying radioactive materials based on their Transport Index, appropriate safety measures can be implemented to ensure the safe transportation of these materials while minimizing the risks of radiation exposure to individuals and the environment.