ABSTRACT
Shielding the "target", for example if workers are located in a blast resistant control center, their exposure to explosions prevents exposure to the hazard.
Prevention of the cause of the hazard, e.g., if a flammable/explosive vapor can accumulate in a confined space but an adequately ventilated design prevents a flammable mixture, i.e., one that is below the Lower Explosive Limit (LEL) from forming.
