Radiation Levels Higher Than Chernobyl Evacuation Limits Span Over 800 Square KM in Japan


The Intel Hub

By Alexander Higgins – Contributing Writer
May 13th,2 011

The latest joint US and Japan survey shows extremely high levels of nuclear radioactive contamination, with radiation levels higher than Chernobyl evacuation limits now spanning over 800 square kilometers in Japan.

Meanwhile, US Media outlets continue to ignore the situation instead opting to run stories with the dishonest theme that this situation is under control.


Latest Aerial Survey Shows High Level Radiation Contamination Spanning Over 800 Square KM in Japan

Radiation-contaminated area spans 800 square km, new map shows

By Hisae Sato and Fumikazu Asai
12 May 2011

The total area contaminated with radiation from the Fukushima No. 1 nuclear power plant is estimated at about 800 square kilometers, or about 40 percent the size of Tokyo, according to a radiation map created by the science ministry and U.S. Department of Energy.

The report uses the same level of contamination (555,000 becquerels or higher of cesium-137) that was used to issue compulsory evacuation orders in the Chernobyl nuclear accident in 1986. …

The report’s radiation levels were determined in April by measuring, from about 150-700 meters above ground, levels of accumulated radiation on the ground. The areas measured were divided into 1- to 2-square-kilometer zones.

According to the map, about 800 square kilometers are contaminated with accumulated cesium-137 of 600,000 becquerels or higher per square meter. The substance has a half-life of about 30 years.

This area is largely the same as the Fukushima no-entry zone and planned evacuation zone designated by the central government. The total area is about one-tenth the size of the contaminated area in the Chernobyl nuclear accident. …

About 370,000 to 630,000 terabecquerels of radioactive substances are estimated to have been released by the crippled plant, according to a report by the Nuclear and Industrial Safety Agency and the Nuclear Safety Commission of Japan.

This radiation amount equals about one-tenth the amount released from the Chernobyl nuclear power plant, whose nuclear reactor was destroyed. …

Source Asahi

Update: Article has been scrubbed. Via WayBack: Scrubbed From Internet – Chernobyl Evacuation Caesium levels 550k bq per meter (PD


The article above references data taken from a joint aerial survey conducted by Japan and the US Department of Energy.

Late afternoon on Monday, March 14, 2011, the Department of Energy and the National Nuclear Security Administration deployed 33 people and more than 17,200 pounds of equipment – including Consequence Management Response Teams and NNSA Aerial Measuring Systems – to Japan in response to the recent earthquake and tsunami.

This video illustrates how the team managing the Aerial Measuring Systems accomplish their mission. It comes from a training mission in Nevada — it is not footage from Japan.

From the Department of Energy Blog.


Joint US/Japan Survey — Ground Level C-134 and C-137 Deposition Survey


Joint US/Japan Survey — Ground Level Radiation Dose Rate Survey


Joint US/Japan Joint Survey – Total Radioactive Cesium Deposition Survey

(Slide Show) Radiation Monitoring Data from Fukushima Area 05/13/2011

View more presentations from US Department of Energy The Situation in Japan (Updated 05/13/11)

As the situation in Japan continues to evolve, we want to keep you abreast of the latest information on the assistance and expertise we’re providing to the Japanese response and recovery efforts. Please take note of the dates attached to each piece of information, as this is a very fluid situation that is continually evolving.

May 13, 2011

In March, the U.S. Department of Energy released data recorded from its Aerial Measuring System as well as ground detectors deployed along with its Consequence Management Response Teams. Today, the Department provided the following update on the information gathered by the AMS. This is the second round of data that was collected and analyzed jointly with the Government of Japan’s Ministry of Education, Culture, Sports, Science and Technology (MEXT). For a link to the joint monitoring data posted on May 6, visit the MEXT webpage.

File footage of the Aerial Measuring System
Download the Slides

Previous radiation monitoring data updates:

May 6, 2011 – View the data (Download)

April 22, 2011 – View the data (Download)

April 18, 2011 – View the data (Download)

April 7, 2011 – View the data (Download)

April 4, 2011 – View the data (Download)

March 29, 2011 –  View the data (Download)

March 25, 2011 – View the data (Download)

March 22, 2011 – View the data (Download)

Source Department Of Energy (Blog)


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