http://www.channelnewsasia.com/stories/afp_asiapacific/view/1122208/1/.htmlTOKYO: Japan may raise the severity of its nuclear accident to seven - the top level on an international scale - from five, the Kyodo news agency reported on Tuesday, as workers battled to contain the crisis.
...The calculation prompted Japan to consider upgrading the accident to the highest level - something that has only be given to the 1986 Chernobyl disaster - Kyodo said, citing unnamed government sources.
According to the INES, level 7 accidents release radioactive material of more than tens of thousands terabecquerels of radioactive iodine 131.
Haruki Madarame, chairman of the government-run commission, said it has estimated that the release of 10,000 terabecquerels of radioactive materials per hour continued for several hours, the report said...
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