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.

 

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