Why must detonators and initiators be stored separately from main explosives?

• A. They are heavy and require separate shelving.
• B. They are less sensitive than main explosives.
• C. They are cheaper to store alone.
• D. They are highly sensitive and can be triggered by shock, heat, or static; separation reduces accidental initiation.

Answer: (D)

The main safety idea is that detonators and initiators are highly sensitive to initiation and can be set off by small energy from shock, heat, or static electricity. Because they’re designed to start the explosive reaction, even a minor impact, friction, or a static discharge can trigger them. Storing them with major explosives creates a pathway for an initiating event to start a large amount of explosive unintentionally, which could lead to a catastrophic detonation. Keeping them separate adds a physical and procedural barrier, so the likelihood that an initiating event occurs while large quantities of explosive are present is greatly reduced. It also allows safer handling and maintenance—if an initiator is faulty or needs inspection, it won’t directly affect the rest of the explosives. Other considerations like weight or cost don’t address this critical risk, and assuming they’re less sensitive would ignore their real vulnerability to accidental initiation.