Readme:

A simple mod that adds two radiation barrels to the Decorations> Misc. Decorations tab.
The mod also adds a triangular danger radiation sign that acts as a marker for a
radiation damage effect. The triangular danger sign is only visible in workshop mode and
doesn't affect NPCs.This makes it so you can place a bunch in one area to really up the
rads or just one for a more calming radiation experience.