Which type of radioactive packaging is allowed for high concentrations of material?

The correct classification for packaging that is allowed for high concentrations of radioactive material is Type B. This classification is specifically designed for the transportation of materials that pose a significant risk due to their radioactivity.

Type B packaging must meet stringent criteria outlined in various regulations, including the ability to withstand severe conditions without releasing radioactive material. This includes tests for structural integrity during impacts, thermal exposure, and immersion in water. The design ensures that, even in the event of an accident, the risk of radiation exposure to the public remains minimal.

In contrast, other packaging types such as Radioactive 1, Radioactive 2, and Type C are not suitable for high concentrations of radioactive materials. Radioactive 1 and Radioactive 2 refer to lower levels of radioactive material that can be transported under less restrictive standards. Type C packaging typically pertains to materials that can be transported at relatively low levels of radioactivity, often by air, and does not encompass the higher-risk materials that Type B is designed to accommodate. Therefore, Type B is correctly identified as the appropriate packaging for high concentrations.