Which object category is defined as a solid object that is not itself radioactive but has radioactive material distributed on its surface?

• A. Surface Contaminated Object
• B. LSA-3
• C. Fissile Material
• D. Low Dispersible Radioactive Material

Answer: (A)

The main idea is contamination on a surface rather than radioactivity inherent in the object. A surface contaminated object is a solid item that isn’t radioactive by itself but has radioactive material distributed on its exterior. This distinction matters because the hazard comes from what's on the surface and can often be addressed by decontamination, rather than from the material’s own radioactivity.

The other terms describe different situations. A material with low specific activity in bulk refers to intrinsic radioactivity within the substance itself, not contamination on an object’s surface. Fissile material is defined by its ability to sustain a nuclear chain reaction, which is a property of the material itself, not a surface contamination scenario. Low dispersible radioactive material describes how easily the material can spread, not whether a solid object is contaminated on its surface.