Which feature makes a chemical oxygen system safe even under severe impact?

The feature that makes a chemical oxygen system safe even under severe impact is the use of inert generators that operate below 400°F. This temperature threshold is critical because it ensures that the components involved in generating oxygen do not reach temperatures that could lead to unsafe conditions, especially during an impact.

Inert generators are designed to produce oxygen through a chemical reaction, and by keeping the operating temperature below this limit, the risk of thermal runaway or other hazardous reactions is minimized. This is particularly important in situations where the system may experience physical stress or damage, as excessive heat could compromise the integrity of the system or create dangerous conditions.

While the other options address various aspects of the oxygen system, they do not directly relate to maintaining safety under severe impact conditions. For example, low pressure storage may contribute to overall safety by reducing the risk of an explosion, and the compact size can aid in installation and functionality, but neither provides the specific thermal stability that is critical in safeguarding the oxygen generation process during a severe impact scenario. An automatic shutoff mechanism adds another layer of safety, but it does not make the system inherently safe from the risks posed by temperature during impact as effectively as the inert generators.