While I love the mod as a whole, especially the main part (the explosion), the radiation has a couple of issues.
One is the geiger counter sound effect. You start taking damage well before you hear the geiger counter go off, and when you do hear it, the sound keeps playing even when you leave the area, and always at the maximum rate, because there's only one sound effect. It would be a huge improvement to use, for example, three shorter sound effects that play depending on how close you are to ground zero, and you should still be able to hear at least a little bit of ticking even if not close enough to take radiation damage.
Speaking of radiation damage, it is a bit strange to see railway tracks and stone walls suffer from radiation poisoning. Is there no way to limit the damage to organics like the poison capsule does? In fact, you could simply make radiation work like an invisible, longer lasting poison capsule.
