What distance should the area surrounding a dud be evacuated?

What distance should the area surrounding a dud be evacuated?

• A. 366 meters
• B. 100 meters
• C. 500 meters
• D. 1 kilometer

Answer: (A)

Unexploded ordnance can still be dangerous after a dud is found, because a firing impulse or fragments from the casing can injure anyone nearby. The safety concept here is to establish a standoff distance that minimizes exposure to blast overpressure and high-velocity fragments. For this scenario, the prescribed evacuation radius is 366 meters. That distance provides a protective buffer against the typical blast/fragment hazards of that munition type while avoiding an overly large exclusion zone. Distances like 100 meters might be too close for worst-case fragment travel, while 500 meters or 1 kilometer would be more conservative than necessary for this case. The idea is to use a weapon-specific, study-tested safe distance so everyone knows how far to stay back until it’s declared safe by qualified personnel.

Unexploded ordnance can still be dangerous after a dud is found, because a firing impulse or fragments from the casing can injure anyone nearby. The safety concept here is to establish a standoff distance that minimizes exposure to blast overpressure and high-velocity fragments. For this scenario, the prescribed evacuation radius is 366 meters. That distance provides a protective buffer against the typical blast/fragment hazards of that munition type while avoiding an overly large exclusion zone. Distances like 100 meters might be too close for worst-case fragment travel, while 500 meters or 1 kilometer would be more conservative than necessary for this case. The idea is to use a weapon-specific, study-tested safe distance so everyone knows how far to stay back until it’s declared safe by qualified personnel.