140,000 CPM from black substance

The video of radiation measurement for “black substance” was uploaded on Youtube.

Black substance is the extremely radioactive material containing cyanobacteria.

Details and location data are not reported, but Fukushima Diary posts this as a reference for the potential research in future.

The radiation level decreased to be 120,000 CPM with one sheet of paper. It became 100,000 CPM with two sheets of paper.


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Français :

Substance noire à 140 000 CPM


La vidéo de la mesure de la radioactivité de la “substance noire” a été mise sur Youtube.

La substance noire est la chose extrêmement radioactive qui contient des cyanobacteries.
Les détails et le lieu ne sont pas précisés mais le Fukushima Diary publie ceci pour les possibles recherches futures.
La radioactivité a chuté à 120 000 CPM avec une simple feuille de papier. Elle est tombée à 100 000 CPM avec deux feuilles.

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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.


May 2013