nuclear radioactive ionizing radiation round yellow black danger painted massive steel checker metal diamond plate wall

abandoned aged atomic background black building caution checker contamination corrosion danger dark derelict design diamond dirty emission energy enter factory format grunge grungy hazard industrial ionizing iron life massive material metal not nuclear old painted pattern plate plutonium pollution power radiation radioactive radioactivity reactor rough round rust rusted rustic safety sign square steel surface symbol texture threatening uranium wall warning waste weathered yellow