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






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