Which term describes the packaging component assembly intended to preserve criticality safety?

• A. Containment System
• B. Competent Authority
• C. Confinement System
• D. Transport Index

Answer: (C)

The idea being tested is how packaging is designed to keep a fissile arrangement subcritical. This is what the confinement system does—the component assembly within the package that maintains criticality safety by controlling geometry, spacing, and mass of the contents, even under normal handling or potential accidents. By shaping how the material sits inside the package and sometimes incorporating absorbers or moderators, it prevents configurations that could reach criticality.

Containment system, in contrast, is about keeping radioactive material from leaking out of the package, not about maintaining subcritical conditions. The competent authority is the regulatory body overseeing safety compliance, not a physical packaging feature. The transport index is a radiation level measure, not a packaging component. So the confinement system is the term that best describes the packaging assembly intended to preserve criticality safety.