16,800 Bq/Kg of cesium from elementary school in Yokohama

16,800 Bq/kg of cesium was measured from rain water tank of an elementary school, Ms. Inoue, a Yokohama city councilor reported on 3/29/2012.

The name of the school is Shimosue elementary school in Tsurumiku Yokohama. The tank is to stock rain water to use for the toilets etc..


On 12/26, Yokohama city board of education measured 16,800 Bq/Kg of cesium from filtering sand of this tank. However, because the safely limit of radiation to be treated as normal garbage is 8,000 Bq/Kg, board of education kept the contaminated sand in the tank and had students use the water for toilets for 3 months.


44 elementary schools use the same facility, and they measured radiation higher than 8,000 Bq/Kg from the ones of 18 elementary schools. They measured radiation from the ones of 39 elementary schools in total.


They are going to stock it on the basement floor of the school until the government orders them how to keep the contaminated sand.

↓ The list of the schools and the radiation levels.

16,800 Bq/Kg of cesium from elementary school in Yokohama






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.


March 2012