Thursday, August 8, 2013
The research, spearheaded by the university’s Institute of Industrial Science, found that cesium-137, which has a half-life of 30 years, tends to get absorbed by clayish soil and concentrate in seabed depressions.
For example, a hot spot 70 meters wide was discovered 32 meters below the ocean surface 5.9 km from the plant.
The team said it found soil there containing radioactive cesium concentrations of 651 becquerels per kilogram.
The research, conducted from last August to July, covered the ocean within 20 km of the nuclear station. In the past scientists had only conducted sporadic samplings for cesium near the plant.
The team found relatively high levels of cesium-137 near the mouth of the Abukuma River in Miyagi Prefecture, 70 km north of the plant.
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Comment: Don't forget the all the tuna caught off the coast of California within months of the meltdown!!! How many more of them are there now???