Ibaraki prefecture manipulated the radiation survey


Ibaraki prefecture published the radiation survey result on 2/16/2012.
The survey was conducted from 8/4/2011 ~ 10/26/2011.

As the result, Strontium89 and Plutonium238 were under detectable level, Ibaraki prefecture asserted Fukushima did not affect Ibaraki.

However, they manipulated the “detectable level”. It’s turned out by telephone interview to Ibaraki prefecture. The person who confirmed this also took the sample of this article ..Breaking news : 8400 Bq/Kg of lead-210 was measured from sample of Yokohama


【重要】昨日発表された茨城県のストロンチウムとプルトニウムの調査について茨城県に確認した。 定量下限値は以下の通り Sr90:40Bq/m2 Sr89:300Bq/m2 Pu238:0.5Bq/m2 Pu239+240:0.5Bq/kg やっぱり300ですか そりゃ出ないわ・・Source

About the measurement of strontium and plutonium by Ibaraki prefecture, I confirmed the lowest detectable level with them. Here are the minimum amount to detect.

Strontium90 : 40Bq/m2
Strontium89 : 300Bq/m2

Plutonium238 : 0.5Bq/m2
Plutonium239+240 : 0.5Bq/kg

The half life time of strontium89 is only 50.52 days. Measurement of this nuclide is crucial to know if it’s from Fukushima. However, the detectable amount of strontium 89 is set extremely high, which can’t even be compared to the amount of strontium90.
Also, the half life time of Plutonium238 is 87.7 years, which is short compared to plutonium 239 and 240. Knowing the ratio of plutonium 238 and plutonium239+240 is important to see if it’s affected by Fukushima. However, their minimum detectable amounts are Bq/m2 and Bq/Kg, which can’t be compared either.


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.


February 2012