Required amount of radiation for different RTs

Radiation Absent

Refueling
Supermarket
Warehouse
Port
Ferry Terminal
Lighthouse
Dump
Abandoned Military Base
Large Oil Platform
Small Oil Platform

Required Protection 11%

Sphere
Aerodrome
Giant Excavator
Satellite Dish
Sewer Drain
Arctic Base

Required Protection 11%, but not everywhere

Military Tunnels 11%, but to loot elite containers, you need 25%
Railway Depot 11%, but in the main building with the map, 25%
Cosmodrome 11%, but in the main building you need more than 50%, and on the rocket, 25%
Red Town 11%, but in the building with the recycler, 25%

Required Protection 25%

Rocket Launch Mine