A malfunction, derived from an emergency test in the Vladimir Iljich Lenin (Chernobyl/Chornobyl) Nuclear Power Plant, resulted core overheating that lead to the explosion of Reactor 4. The explosion dispersed vast amount of radioactive materials around the area making it uninhabitable. The evacuation of the city of Pripyat/Prypyat started after 36 hours after the accident because of high radiation level.
If you need a real a larger area of The Zone, please check out Chernobyl Disaster Area 3D model : https://www.cgtrader.com/3d-models/architectural/street/chernobyl-disaster-area
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