Friday, November 25, 2011

#Radiation in Japan: Southern Miyagi's Disaster Debris May Be Too Radioactive

After the Tokyo Metropolitan government merrily signed the agreement with Miyagi Prefecture to accept radioactive disaster debris and burn it in regular incinerators operated by municipal governments all over Tokyo (see my post yesterday), Miyagi Prefecture announces that some of the Miyagi disaster debris may be too radioactive when burned.

So? Mix and burn. Or just send it to Governor Ishihara. He won't care, even if the residents may. He will be happy to receive the highly radioactive ashes from Miyagi and bury them anyway in Tokyo Bay. Mix and bury.

From Jiji Tsushin (11/25/2011; the link won't last):


Miyagi Prefecture wants to have the disaster debris from the March 11 earthquake/tsunami processed outside the prefecture, but on November 25 the prefectural government announced that the flammable debris in two towns in the southern part of Miyagi, Watari-cho and Yamamoto-cho, has reached the concentration of radioactive cesium that may warrant caution. The prefecture conducted the survey of radioactive cesium in the debris in 11 municipalities along the coast. Still, the Miyagi government says the debris will be thoroughly cleansed in the temporary storage areas to make sure it is safe, and then shipped outside the prefecture to be buried.


According to the survey, the radiation levels in the debris in the southern part of Miyagi are high. By the types, the debris that contains fabric that is prone to attracting minute dusts has high radiation concentration. The flammable debris in Watari and Yamamoto is estimated to have 350 Bq/kg and 769 Bq/kg of radioactive cesium, respectively.


The flammable debris will be moved to the secondary temporary storage areas and be burned. However, the prefectures that have been hit by the disaster, including Miyagi, has requested that part of the ashes be transported outside the prefectures and processed [buried, recycled]. According to the national guideline, radioactive cesium would be concentrated up to 33 times after burning the debris. If the flammable debris from Watari and Yamamoto were burned on its own, it might exceed the national guideline of 8000 becquerels/kg [of radioactive cesium] and couldn't be buried.

Why do they pretend as if 8000 becquerels/kg from the debris were a big deal, when the Ministry of the Environment has long issued the guideline saying the radioactive debris/garbage may be mixed with debris/garbage not contaminated with radioactive materials (if any in Tohoku and Kanto) so that the radiation gets lowered in the ashes?

Why does Miyagi insist that part of the debris ashes be buried outside Miyagi, anyway?

Well that aside, applying the multiplier (33),

  • Yamamoto-cho's debris: 769 x 33 = 25,377 becquerels/kg

  • raWatari-cho's debris: 350 x 33 = 11,500 becquerels/kg


Scott said...

Your readers might be interested in this:


"Dismissed as a “nobody” by Japan’s nuclear industry, seismologist Katsuhiko Ishibashi spent two decades watching his predictions of disaster come true: First in the 1995 Kobe earthquake and then at Fukushima. He says the government still doesn’t get it.

The 67-year-old scientist recalled in an interview how his boss marched him to the Construction Ministry to apologize for writing a 1994 book suggesting Japan’s building codes put its cities at risk. Five months later, thousands were killed when a quake devastated Kobe city. The book, “A Seismologist Warns,” became a bestseller."

Japan's building codes were allegedly the best in the world re seismic durability.

Atomfritz said...

"Why does Miyagi insist that part of the debris ashes be buried outside Miyagi, anyway?"

I don't understand this too, really.
Maybe it's the japanese mentality?

Or maybe is it the same mentality that the governments of the reactor-operating german states show when demanding that the radioactive waste they produced must not be stored in their state but in others?

Anonymous said...

robertb said...

So burning radioactive waste which re-volatizes it and sends it into the atomosphere is a solution? Great work...

Post a Comment