130 million Bq of cesium has leaked to Tokyo bay in Yokohama

130 million Bq of cesium has leaked to Tokyo bay from Yokohama


130 million Bq of cesium has leaked to Tokyo bay from Yokohama1


↓ Zeolite

130 million Bq of cesium has leaked to Tokyo bay from Yokohama2


130 million Bq of cesium has leaked to Tokyo bay from Yokohama3
Radioactive garbage can be treated as normal garbage if it’s less than 8,000 Bq/kg.
Yokohama city deposits incinerated ash of normal garbage at the final disposal site of Minami Honmoku.

It is a part of Tokyo bay, incinerated ash is used to fill the sea.
Yokohama city government was supposed to filter the water when it overflows from inside of the site to Tokyo bay with zeolite.
However, they quit using it last November. Yokohama city councilor, who found this out assumes Yokohama city is trying to hide the contamination level because if they use zeolite, they can measure how much it is contaminated.  They have already deposited incinerator fly ash to the sea, which is the most contaminated and the cesium contained in incinerator fly ash is very water solubility.
Last June, the maximum radiation level of fly ash was 2,400 Bq/Kg.

However, the zeolite was contaminated as 5,000 Bq/Kg though it was used only for 26 days.
There were 5,500 Kg of zeolite to filter, so the total cesium amount was 5,000 Bq/Kg×5,500Kg=27,500,000Bq.
It means, it would have filtered 100 million Bq per day.
They stopped using it since 11/1/2011, about 130,000,000 Bq of cesium has already leaked to Tokyo bay.


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