Read the mod page.
Ummm ok, I read most of the sections but just didn't read the Harazd Zones section, I guess you mean this section, right?
“Radiation can and will permanently debuff and eventually apply health drain to your character if you are not careful and leave it untreated. This applies to your player scav too. Yes, toxicity and radiation carries across scav raids.”
I'll take a look at it, thanks again.