LyrArc Article Gist
Tokyo Electric Power says that a total of 11,125 spent nuclear fuel rod assemblies were stored at the Fukushima nuclear plant. Experts say that this is 4 times as much radioactive material as in the reactor cores combined. Germany and China do not store these spent fuel rods at their nuclear plants for safety reasons. This is the practice in Japan, at Fukushima, and at some U.S. nuclear plants.The storage pools of water needed to keep these fuel rods has leaked because of the earthquake. And there are signs that some fuel rods have begun to melt and release extremely high levels of radiation. Richard Lafey, Jr., is a retired nuclear engineer who supervised General Electric's safety research for the type of reactor used in Fukushima. He says the zirconium cladding of the fuel rods can catch fire if exposed to air for hours, when the storage pool of water is lost. Zirconium, after it catches fire is so hot that its hard to extinguish.

LyrArc Article Gist
Data collected by the Aerial Measuring System from American flights over the Fukushima nuclear plant show that radioactive contamination has not spread beyond a 19 mile range from the plant. The system uses a plane and a helicopter flying over the site with equipment taking measurements in the immediate vicinity of the plant.

LyrArc Article Gist
Analysts estimate a small impact of Japan's earthquake on the world economy. According to one estimate global growth would decline by only 0.1% to 4.2%, if the growth in Japan is flat, instead of 1.5%.