The term "special form" refers to which of the following?

The term "special form" specifically refers to the double encapsulation around radioactive material. This designation is critical in ensuring that nuclear materials are contained in a way that minimizes the risk of exposure and environmental contamination. The special form design usually includes features that prevent the release of radioactive contents under normal conditions and specific accident scenarios. This encapsulation is designed to meet regulatory requirements, which affirm that such materials can be safely handled and transported.

The concept is vital for ensuring safety in operations involving radioactive materials. It solidifies the understanding that the container design plays a significant role in the overall safety protocols in handling nuclear gauges and materials.