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Message Subject *** Fukushima *** and other nuclear-----updates and links
Poster Handle Anonymous Coward
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Professor: Cesium in wild mushrooms not caused by Fukushima accident
Cesium-137, which has a half-life of 30 years, was detected at a level of 120 becquerels, exceeding the government-mandated safe level of 100 becquerels per kilogram. But no cesium-134, which has a half-life of two years, was found in the mushrooms.

Similarly, in “sakura shimeji” mushrooms from the city of Aomori, cesium-137 was measured in late October at 107 becquerels, while almost no cesium-134 was found.

"The fact that no cesium-134 has been detected proves that the contamination happened prior to the Fukushima nuclear accident,’’ Muramatsu, 62, said. “It is from nuclear weapons tests conducted by the Soviet Union and China from the late 1940s to the late 1960s, and from the Chernobyl accident in 1986."

In the 1990s, after the Chernobyl disaster, Muramatsu and his research team studied the effects on wild mushrooms in Japan. They found radioactive cesium exceeding 100 becquerels, mainly in northern Japan.

Some of the mushrooms topped 1,000 becquerels, and when dried, some had readings that were over 10,000 becquerels.

At that time, the Japanese government did not have any restrictions on shipping.

[link to ajw.asahi.com]
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