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Seawater collected near the water intake of the No.2 reactor on Saturday was found to contain 0.058 becquerels of cesium-134, or 0.97 times the government-set safety limit. It also contained 0.056 becquerels of cesium-137, or 0.62 times the limit. Both figures were around one tenth of the level found on the previous day.
In April, the level of cesium-137 in seawater near the water intake of the No.2 reactor was found to be 1.1 million times the safety limit. Since then, the density of the radioactive element has been declining, and recently it has fallen below the limit sometimes.
They found 280,000 becquerels of radioactive cesium per kilograms in wheat leaves which had grown before the disaster and were exposed to the radiation from Fukushima. Meanwhile wheat grain which grew afterwards showed about 300 bequerels of cesium, or about one 1,000th of the cesium found in leaves.
Mushrooms joined the threats to Japan’s food chain from radiation spewed by Tokyo Electric Power Co.’s Fukushima Dai-Ichi nuclear plant, as the country expands efforts to limit the effects of the disaster.
Japan is under pressure to enhance food inspections as it has no centralized system for detecting radiation contamination. About two-thirds of Japan’s prefectures now plan to check rice crops, the Mainichi newspaper reported yesterday, citing its own survey. Half of Japan’s rice is grown within range of emissions from the crippled nuclear plant, and farmers are awaiting the results of tests before harvesting begins this month.
The vessel Pacific Grebe set sail Aug. 3 to Japan from Britain with more than 30 metric tons of radioactive waste on board. The cargo, Japanese spent fuel reprocessed in the U.K., is returning sealed in 76 stainless steel canisters packed into 130-ton containers. It will arrive early next month at the Mutsu-Ogawara port in northern Honshu for delivery to Japan Nuclear Fuel’s nearby Rokkasho storage site.
A spike in radioactive sulfur from the damaged Japanese nuclear plant was detected in California in late March, but researchers say it posed no threat to health. While the amount was higher than normal background levels, it was still small, said Mark Thiemens of the University of California, San Diego.
Originally posted by Purplechive
Workers at Fukushima Report steam rising from cracks in the ground
- Purple Chive
Thiemens and his colleagues calculated that 400 billion neutrons were released per square yard of the cooling pools surfaces between March 13, when the seawater pumping operation began
Concentrations a half-mile or so above the ocean near Fukushima must have been about 365 times higher than natural levels to account for the levels they observed in California, the researchers said.