What is the difference between "ignition source controls" and "energy release controls" in explosive safety?

• A. Ignition source controls address heat and sparks; energy release controls address the timing of detonation only.
• B. Ignition source controls address weather and humidity; energy release controls address packaging integrity.
• C. Ignition source controls address heat, sparks, and open flames; energy release controls address handling and containment of explosive materials to prevent release.
• D. Ignition source controls address labeling and recordkeeping; energy release controls address scheduling of maintenance.

Answer: (C)

In explosive safety, you think in terms of two broad families of controls: preventing an ignition in the first place, and preventing or limiting what happens if an energetic event could occur. Ignition source controls are about eliminating or reducing anything that could start a reaction—heat sources, sparks, open flames, static electricity, or hot surfaces. The goal is to keep the material from being ignited at all, so measures focus on removing ignition triggers and keeping the environment free of sources of ignition.

Energy release controls, on the other hand, deal with what happens after an energetic material might release its energy. They address how the material is handled, stored, and contained to prevent a release of energy or to limit its consequences if release occurs. This includes proper packaging, containment, isolation from other materials, barriers, ventilation considerations, and procedures to keep energy from being released or propagating.

The correct statement matches these ideas: ignition source controls address heat, sparks, and open flames; energy release controls address handling and containment of explosive materials to prevent release. The other choices describe aspects that aren’t the distinguishing focus of these two control types.