Home

Follow Countercurrents on Twitter 

Why Subscribe ?

Popularise CC

Join News Letter

Editor's Picks

Press Releases

Action Alert

Feed Burner

Read CC In Your
Own Language

Bradley Manning

India Burning

Mumbai Terror

Financial Crisis

Iraq

AfPak War

Peak Oil

Globalisation

Localism

Alternative Energy

Climate Change

US Imperialism

US Elections

Palestine

Latin America

Communalism

Gender/Feminism

Dalit

Humanrights

Economy

India-pakistan

Kashmir

Environment

Book Review

Gujarat Pogrom

Kandhamal Violence

WSF

Arts/Culture

India Elections

Archives

Links

Submission Policy

About CC

Disclaimer

Fair Use Notice

Contact Us

Search Our Archive

Subscribe To Our
News Letter



Our Site

Web

Name: E-mail:

 

Printer Friendly Version

Japan Raises Meltdown Severity Level To Highest 7

By Kyodo News

12 April, 2011
Kyodo News

Japan has now decided to raise the severity level of the accident at the crippled Fukushima Daiichi nuclear plant to 7, the highest on an international scale, from the current 5, government sources said Tuesday.

The sources close to the Nuclear and Industry Safety Agency under the Ministry of Economy, Trade and Industry said the Japanese government decided to raise the level to the highest 7 on the International Nuclear Event Scale, which has so far only been applied to the 1986 Chernobyl catastrophe.

The current provisional evaluation of 5 is at the same level as the Three Mile Island accident in the United States in 1979.

* * * * *

The Nuclear Safety Commission of Japan released a preliminary calculation Monday saying that the crippled Fukushima Daiichi nuclear plant had been releasing up to 10,000 terabecquerels of radioactive materials per hour at some point after a massive quake and tsunami hit northeastern Japan on March 11.

The disclosure prompted the government to consider raising the accident's severity level to 7, the worst on an international scale, from the current 5, government sources said. The level 7 on the International Nuclear Event Scale has only been applied to the 1986 Chernobyl catastrophe.

The current provisional evaluation of 5 is at the same level as the Three Mile Island accident in the United States in 1979.

According to an evaluation by the INES, level 7 accidents correspond with a release into the external environment radioactive materials equal to more than tens of thousands terabecquerels of radioactive iodine 131. One terabecquerel equals 1 trillion becquerels.

Haruki Madarame, chairman of the commission, which is a government panel, said it has estimated that the release of 10,000 terabecquerels of radioactive materials per hour continued for several hours.

The commission says the release has since come down to under 1 terabecquerel per hour and said that it is still examining the total amount of radioactive materials released.

The commission also released a preliminary calculation for the cumulative amount of external exposure to radiation, saying it exceeded the yearly limit of 1 millisieverts in areas extending more than 60 kilometers to the northwest of the plant and about 40 km to the south-southwest of the plant.

It encompasses the cities of Fukushima, Date, Soma, Minamisoma, and Iwaki, which are all in Fukushima Prefecture, and some areas including the town of Hirono in the prefecture.

Within a 20-km exclusion zone set by the government, the amount varied from under 1 millisieverts to 100 millisieverts or more, and in the 20-30 km radius ring where residents are asked to stay indoors, it came to under 50 millisieverts.

The commission used the System for Prediction of Environmental Emergency Dose Information to calculate the spread of radiation.

© 2011 Kyodo News / Japan

 



 


Comments are not moderated. Please be responsible and civil in your postings and stay within the topic discussed in the article too. If you find inappropriate comments, just Flag (Report) them and they will move into moderation que.