Updated to latest Factorio version.
Original author timeo
https://mods.factorio.com/mod/Contamination Radioactive Contamination
- uranium ore (less toxic)
- producing nuclear reactor (less toxic)
- producing centrifuge (more toxic)
- uranium 235 / uranium 238 (less toxic)
- uranium fuel cell (less toxic)
- used up uranium fuel cell (very toxic)

If you want it more or less toxic, you can change the toxicity-value multipier like 0.8 for less toxic or 1.2 for more radiation.

New in 0.0.8: configurable radiation. Radioactive player inventory
New in 0.0.9: Removed Debug output