Plutonium 238 measured in Minamisoma

Plutonium 238 measured in Minamisoma

 

Plutonium 238 measured in Minamisoma2

 

Plutonium 238 measured in Minamisoma3

 

Following up this article..0.27 μSv/h alpha ray on the roof of Minamisoma city hall

0.038 Bq/Kg (2.47Bq/m2) of Plutonium 238 was measured in Minamisoma.

They also measured 0.047 Bq/Kg ofPlutonium 239 and 240, and 0.73 Bq/Kg of Plutonium 241.

8.5 Bq/Kg of Strontium 89, and 50 Bq/Kg of Strontium 90 was also measured.

Mr. Oyama, Minamisoma city councilor had city government measure it.  He comments like these below,

 

  • Sample was taken after decontamination.
  • The sample contains soil, sand, and water other than black substance.(Water ratio is not announced.)
  • Sample to consist of only black substance and water (Moisture content = 71.4%) contains 309,000 Bq/Kg of cesium and it’s 1,080,000 Bq/Kg when it’s dry. It therefore will be more than 3 times higher if it doesn’t content sand, soil or water.
  • Pu238/Pu239+240 used to be 0.027 before 311. This result shows it’s 0.808.
  • The analysis was done by Japan Chemical Analysis Center, which is outsourced by the government.

 

Source

 

 

About this site

This website updates the latest news about the Fukushima nuclear plant and also archives the past news from 2011. Because it's always updated and added live, articles, categories and the tags are not necessarily fitted in the latest format.
I am the writer of this website. About page remains in 2014. This is because my memory about 311 was clearer than now, 2023, and I think it can have a historical value. Now I'm living in Romania with 3 cats as an independent data scientist.
Actually, nothing has progressed in the plant since 2011. We still don't even know what is going on inside. They must keep cooling the crippled reactors by water, but additionally groundwater keeps flowing into the reactor buildings from the broken parts. This is why highly contaminated water is always produced more than it can circulate. Tepco is planning to officially discharge this water to the Pacific but Tritium is still remaining in it. They dilute this with seawater so that it is legally safe, but scientifically the same amount of radioactive tritium is contained. They say it is safe to discharge, but none of them have drunk it.

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