how long does nuclear radiation stay in the air

The amount of time nuclear radiation stays in the air depends on several factors, but here’s a breakdown:

• Immediately after a detonation: Radiation levels are extremely dangerous in the first hours and days.
• Rapid Decrease: Thankfully, radiation levels drop significantly over a short period. Over half of the potential exposure from fallout happens in the first hour, and 80% within the first day.
• Particle Size Matters: Larger, heavier fallout particles fall out closer to the blast site quicker. Smaller particles can stay airborne for much longer, potentially days or even weeks.
• Weather plays a role: Wind patterns significantly affect how far fallout travels and how long it stays suspended.