Monday, August 1, 2011

#Radioactive Fallout in Tokyo in March: Iodine, Cesium, Tellurium, Radioactive Silver

Silver-110m, half life about 250 days, wouldn't have been discovered unless the control rods had melted at Fukushima I Nuclear Power Plant.

There was the news in early April that radioactive silver was detected in South Korea. There was no way the same nuclide wasn't falling in Japan if it could fly all the way to Korea, I thought.

Sure enough.

It was not until 2PM on July 29 that the Ministry of Education and Science announced the "reading of environmental radioactivity level by prefecture [Fallout]" for March 2011.

What's the point of telling us now? Just for the record?

Radioactive materials that were falling in the Kanto region in March, other than iodine-131, cesium-134 and -137, are:


They look to be the nuclides coming out of melted fuel rods. No plutonium, strontium or uranium are mentioned.

The level of radioactive iodine (131) and cesium (134, 137) is also markedly high in Kanto. It is particularly high in Tochigi and Ibaraki Prefectures, and it is higher in Tokyo than in Saitama or Chiba. The area with the elevated level of radioactive fallout includes Shizuoka and Nagano Prefectures. For details for other prefectures, please go to the Ministry of Education website.

March result (part):


Anonymous said...

Plutonium must be there, as well as cobalt 60. But they are very difficult to detect so maybe they are rated as not detected.

Anonymous said...

So why release March--as they say there is NO major radiation issues outside the 20KM zone? Why now? Why not release June or July data from the same area? If they are encouraging people to return to their homes in the "zone", would think best to show the CURRENT (lower??) radiation levels. Or are the June/July levels even higher (WORST) and more dangerous?

arevamirpal::laprimavera said...

@anon at 5:57PM, they released what they'd been hiding, which is March data that shows these nuclides. March was the worst.

Anonymous said...

i think more importantly, what are the current measurements now?

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Anonymous said...

What gives with the silver-110 half-life, is it 24 seconds for the meta, too?

Anonymous said...

"Silver-110m, half life about 250 days"

missed that

Anonymous said...

@ Anon 6:31

The current measurements are all available at the Tepco site that Primavera linked to.

Anonymous said...

@ Anon 8:19
Thanks for the heads up.

- Anon 6:31

Anonymous said...

Is the Japanese Government afraid to use the word PLUTONIUM? The whole country must be covered with it by now!

Anonymous said...

Very soon, the first humans will be born that were exposed to this.

You will hear the screams in Japan, as families realise the horrors that await them in the future.

Anonymous said...

"Very soon, the first humans will be born that were exposed to this.

You will hear the screams in Japan, as families realise the horrors that await them in the future."

A horrific thing to have to anticipate (or is it remember, depleted uranium munitions?).

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