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In the shadow of Chernobyl – 27 years later : Cesium-137 found in wood ash from Japan

26 April 2013

Published by EXSKF

And of atmospheric testing of nuclear weapons by world nuclear powers, which did not stop until 1980 (China).

One of my twitter followers lives in south western Japan. A while ago he sent me the result of the test he had it done with the ashes from burning wood pellets in his stove this winter. The lab test, using the germanium semiconductor detector, found 223.8 Bq/kg of cesium-137.

He was upset, thinking it is from Fukushima I Nuclear Power Plant, until I pointed out to him that there was no cesium-134 found. The Cesium in the ashes is most likely from the fallout from atmospheric testing, and the Chernobyl accident in 1986.

He burned 600kg of wood pellets made from cedar trees in Ehime Prefecture in Shikoku Island in southwestern Japan. According to the pellet manufacturer, the concentration factor was about 375, and radioactive Cesium (Cs-137) in the pellets was estimated to be about 0.59 Bq/kg.

He said he will “entomb” the ashes with concrete and bury.

The chart plotting the historical monthly fallout in entire Shikoku (4 prefectures, as they didn’t start measuring the fallout in Ehime until 1977) shows the spike from the Chernobyl accident was less than that of the atmospheric testing, and larger than that from the Fukushima accident. (The chart was created from data at Japan Chemical Analysis Center. Y-axis in log scale.)

In 2012 he tested the ashes from burning the wood pellets from a different company, and to his great dismay the test found 1,000 Bq/kg of radioactive Cesium (Cs-137) in the ashes. He had already spread some of those ashes on his home garden. Those pellets, it turned out, were made from trees from Europe (Sweden, Finland, Germany, Austria) that the manufacturer had started to purchase in 1994 . That manufacturer told him that it had never ever occurred to them that the trees were contaminated from the Chernobyl accident, and there was no regulation on importing. The manufacturer told him that they chose European trees because they were cheap, and supply was steady.

April 26 marks the 27th anniversary of the Chernobyl Nuclear Plant accident.

Radiation of Chernobyl blast discovered in Sri Lankan soil

Friday, 19 April 2013 – 01:06 PM

A sample test carried out by the Sri Lankan Atomic Energy Authority has found some acute radioactive particles which were released by the Chernobyl nuclear explosion of Ukraine in Sri Lankan soil.

“If an accident takes place in the Kundankulam Nuclear plant it will directly effect the public within a 50 Kilometre radius. The public will NOT be evacuated in such an instance.
The closest nuclear plant to Sri Lanka  is 220 Kilometres, the further the distance the less the impact but if an accident did take place, radioactive material can settle down in the soil in Sri Lanka but this would be in minimal quantities and the risk would be minimal

April 26, 2013 - Posted by | Uncategorized

1 Comment »

  1. Does anyone know of a way to extract the Cesium from the ashes? Ashes are good for plants (to a point) radio-cesium, not so much. If your TF could easily extract the Cesium, perhaps the ashes could still be used.

    Comment by SA Kiteman | June 13, 2013 | Reply

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