What is the minimum distance for fuel for Radiation Hazard - MMR APY-11?

• A. 300 feet
• B. 130 feet
• C. 50 feet
• D. 15 feet

Answer: (A)

The key idea is that fueling near high-powered radar equipment requires a large safety buffer to protect against two hazards at once: fuel vapors and RF radiation from the radar. Fuel vapors can ignite, so keeping people and equipment well away from the fueling area reduces the chance of a spark or hot surface igniting vapors. At the same time, the APY-11 radar emits RF energy, which can pose exposure risks at close range, especially during active fueling operations when people are nearby.

A minimum distance of 300 feet provides a conservative, broad protection zone that helps ensure fuel vapors don’t reach ignition sources and that RF exposure in the fueling area stays well below safety limits under typical conditions. The smaller distances listed (130 feet, 50 feet, 15 feet) would not reliably account for vapor dispersion in varying wind conditions or for the RF exposure risk around the radar, so they’re not sufficient for this hazard scenario.