Level of radiation dump by TEPCO in the Pacific Ocean is so mind-boggling that a new unit may be needed for nuclear disasters (15 peta-Becquerels just for March 2011). Fish and seafood is contaminated and even the Ocean cannot dilute such a radioactivity source.
An article published 2 weeks ago in Japan Times states that cesium would be back in Japan after 20 to 30 years, promoting a false immediate sense of security. Yet sea radiation maps show the area of dispersion： radiation is here to stay, all along the coast and far reaching – the issue is not the round trip, even if it happens. After more than 90 years, there would still be about 10% of cesium – not to mention all the other radionucleides.
Here is a screenshot of a 3D map of the extent of the radiation in the Pacific Ocean from 2011 July 15. Two months and a half later, it is easy to extrapolate the reach to all of Japan eastern coast save Okinawa and hence absolutely no fish nor seafood from Japan should be eaten at all.
A private consulting firm called ASR also allows viewing it with Google Earth on their site.
Cesium in sea may return in 20 to 30 years
Kyodo, Thursday, Sep. 15, 2011
Radioactive cesium that was released into the ocean from the Fukushima No. 1 nuclear plant is likely to flow back to Japan’s coast in 20 to 30 years after circulating in the northern Pacific Ocean in a clockwise pattern, researchers said Wednesday.
Researchers at the Meteorological Research Institute and the Central Research Institute of Electric Power Industry estimated that the amount of radioactive cesium-137 that was directly released into the sea came to 3,500 terabecquerels from March to the end of May, while estimating that roughly 10,000 terabecquerels fell into the ocean after it was released into the air.
Cesium-137 has a relatively long half life of about 30 years and can accumulate in the muscles once it is in the body and can cause cancer.
According to the analysis, the cesium is expected to first disperse eastward into the northern Pacific. It will then be carried southwestward before some of it returns to the Japanese coast carried northward by the Japan Current from around the Philippines.