nuclear-news

Where to put 23 Tokyo Domes-full of radioactive waste? wonders Japan

Radioactive soil can fill 23 Tokyo Domes, Five prefectures’ nuclear burden a hot potato no one wants to catch, Japan Times By SETSUKO KAMIYA 29 Sept 11 Radioactive soil and vegetation that must be removed in Fukushima and four adjacent prefectures could reach up to 28.79 million cu. meters, equal to filling the Tokyo Dome 23 times, according to a recent Environment Ministry estimate.

But finding a disposal or temporary storage site will be a tall order. The estimate covers soil and dead leaves mainly from areas with radiation levels of more than 5 millisieverts per year in the prefectures of Fukushima, Miyagi, Yamagata, Tochigi and Ibaraki, whose data were used to mete out the rough figures.

In Fukushima, home of the nuclear plant leaking all the radiation, about 17.5 percent of the prefecture is contaminated to that level. The estimate was submitted Tuesday to a 12-member expert panel working out decontamination plans. The panel assumed that 5 cm of topsoil should be removed from contaminated areas, including pinpoint decontamination efforts in certain locations with radiation of 1 to 5 millisieverts per year.

The government is hammering out details on plans to remove and store the soil and leaves. But finding a location to temporarily store such a huge amount of radioactive materials will be an extremely sensitive and politically difficult task for the central government.

Breaking down the total, contaminated soil from residential areas was estimated at 1.02 million cu. meters, farm land at 17.43 million cu. meters and forests at 8.76 million cu. meters, the Environment Ministry said.

A single facility capable of housing the entire 28.79 million cu. meters of soil would have to be 1 sq. km in area and 30 meters deep. But if the central government decides on multiple facilities, negotiations would have to be completed with numerous local governments. The location for a temporary facility is still undecided, but the government is reportedly considering Fukushima Prefecture….. http://search.japantimes.co.jp/cgi-bin/nn20110929a3.html

October 4, 2011 - Posted by Christina Macpherson | Japan, wastes