When the cooling system failed at Japan's Fukushima Dai-Ichi reactor Number 2, the fuel rods boiled through the available water and were for a period of hours exposed to the air.
日本福岛二号核反应堆冷却系统破坏后，核燃料棒将可用的水煮沸，并露出水面数小时。
2
Most of the time, air conditioning is done by fat air ducts which gobble both energy and space between floors and ceilings. Here the cooling is done by a cool water system.