How are explosion scenarios categorized in SAChE source models?

• A. Fusion and fission
• B. Deflagration and detonation
• C. Chemical and physical explosions
• D. None of the above

Answer: (D)

SAChE source models categorize explosion scenarios by how the energy is released and how the event is confined, focusing on the origin of the release (such as gas or vapor cloud explosions, dust explosions, BLEVE, or runaway reactions) and whether the event is confined or unconfined. This framework mirrors how analysts map a real incident to a representative source and then apply consequence models for blast pressure, thermal effects, and fragmentation, rather than labeling explosions by nuclear processes, a specific flame propagation mode, or just chemical versus physical distinctions. That’s why none of the other pairings fit SAChE’s approach: fusion/fission is a nuclear concept outside this domain; deflagration vs detonation are specific combustion modes, not the overarching classification used; and chemical vs physical explosions is too coarse to capture SAChE’s scenario families.