Which storage arrangement best minimizes the risk of cascading initiation between magazines?

• A. Store all mags in one room without barriers.
• B. Place magazines close together in a single block.
• C. Segregation by hazard class with separate compartments and adequate distance and barriers.
• D. Store initiators near main explosives.

Answer: (C)

The idea is to prevent a fire, heat, or shock in one magazine from triggering others. Segregating by hazard class and using separate compartments with adequate distance and barriers creates physical separation that slows or stops the spread of ignition. By keeping incompatible or different types of explosives apart, you reduce the chance that a blast, fire, or initiating source in one magazine will set off another. Barriers like fire-rated walls and distance between rooms act as fire and blast lanes, containing anything that starts and preventing it from reaching neighboring magazines.

If you store all magazines in one room or in a tight block, ignition in one area can quickly spread to adjacent magazines due to shared ignition sources, heat, and flame exposure, making a cascade more likely. Placing initiators near main explosives is dangerous because an initiating device could directly trigger the explosive contents, raising the probability of a rapid, multi-magazine incident. So, separating by hazard class with dedicated compartments and sufficient distance and barriers best minimizes cascading initiation.