How is the term 'blast radius' defined?

The term 'blast radius' is defined as the area surrounding an explosive device that is likely to be affected by an explosion. This includes not only the zone where the explosion occurs but also the surrounding areas where pressure waves, shrapnel, and other effects of the explosion can cause damage or injury. Understanding the blast radius is essential for EOD personnel to effectively assess risk, plan safe distances for personnel and equipment, and devise appropriate mitigation strategies when dealing with explosive threats.

The other options do not accurately capture the concept of blast radius; for instance, the duration of an explosion or the height of the explosion only describe particular characteristics that don’t encompass the spatial aspect of the effects of an explosion. The initial impact zone of an explosive device refers to the spot directly impacted by the blast but does not account for the wider area that might also experience significant effects. Hence, recognizing B as the definition of blast radius aligns with how explosive hazards are assessed in EOD scenarios.