Ключевые слова: alarm, alert, atom, atomic, background, badge, caution, danger, dangerous, emblem, energy, environment, hazard, hazardous, icon, illustration, image, isolated, label, nuclear, physics, plutonium, power, protection, radiation, radioactive, radioactivity, radiological, radiology, ray, reactor, risk, road, safety, security, sign, symbol, toxic, triangle, warning, yellow,