So far, the overall radioactivity release has been around 10 percent of that seen at Chernobyl 25 years ago, the Japanese authorities have said. And the International Atomic Energy Agency's head of nuclear safety, Denis Flory, said the amount would not increase much further. "There has been high bursts of radioactivity from the beginning," Flory told a regular news briefing here.
Currently, radioactivity was still leaking "at low level" but those leaks were decreasing.
"So, taking into account all the measures that are foreseen, the new amount of release will be decreasing and decreasing, and the total amount would not be much different from what it is today," the expert said.
According to Japanese estimates, the total radiation release at Fukushima so far has been 370,000 terrabecquerels, compared with 5.2 million terrabecquerels at Chernobyl.
http://www.google.com/hostednews/afp/article/ALeqM5hIyeY6j9yWdD0J4NMk5wwFOkTRvA?docId=CNG.714a6bc6f5208ee79e66887d6e473e7e.671 Also relevant is the fact that a far higher proportion of Chernobyl's release was in the form of longer-half-life elements.