Tuesday, Japanese authorities provisionally declared the country’s nuclear accident a level 7 on the international scale for nuclear disasters. A 7 is the highest level.
Though the rating puts Japan‘s disaster at the same level as the Chernobyl disaster, about 7 times as much radioactive cesium was released at Chernobyl.
The number had previously been at a 5.
Regulators determined the amount of radioactive iodine released by the Fukushima Daiichi reactors was at least 15 times that needed to reach the top of the International Nuclear Event Scale.
- Japan Widens Evacuation Area (online.wsj.com)
- Japan Raises Nuke Alert to Chernobyl Level (abcnews.go.com)
- Fukushima: Second Worst Nuclear Disaster Ever (538refugees.wordpress.com)
- Japan Widens Evacuation Net (online.wsj.com)
- Japan Considers Raising Nuclear Disaster from Level 5 to 7 Based on Extremely High Radiation Readings (ritholtz.com)