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NNSA Releases Raw Data from Radiation Monitoring Efforts in Japan

October 21, 2011

WASHINGTON, D.C. -- Following the earthquake and subsequent
tsunami that devastated Japan, the National Nuclear Security Administration
(NNSA) is today releasing the raw radiation monitoring data it collected in
response to the events at the Fukushima Daiichi nuclear power station.

For ten weeks following the natural disaster, NNSA
scientists utilized U.S. Air Force aircraft operated out of Yokota Air Base to
collect data during more than 500 flight hours of aerial surveys to measure
radiation levels associated with radioactive material deposited on the ground surrounding
the Fukushima Daiichi nuclear power station. 

“NNSA’s commitment to assisting the Japanese people in the aftermath of a
devastating natural disaster demonstrates the value of international
cooperation in supporting the monitoring and clean-up of a nuclear incident,” said Under Secretary for
Nuclear Security & Administrator for the National Nuclear Security
Administration Thomas P. D’Agostino. “NNSA’s unique capabilities played an
important role in responding to this tragedy, and we are committed to the transparency
of our data and information.”

After deploying its Consequence Management Response Team and
Aerial Measuring System, the Department of Energy and NNSA have provided
ongoing assistance to the Government of Japan to support dose assessment
through collaboration on data analysis and quality control.  NNSA also loaned the Government of Japan an Aerial
Measuring System and other equipment to augment their capability.

A small NNSA team will return to Japan this month to provide
further data collection and analysis support. 
Once these data have been collected and analyzed, results will also be
widely available to the public for independent study and review.

Maps detailing the data collected from the flights can be
found here. The
data from the efforts mentioned above are now publicly available for download
on at the following links: 

Field Team
Radiological Measurements

Radiological Air

Radiological Soil

Raw Aerial Data
and Extracted Ground Exposure Rates

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Established by Congress in 2000,
NNSA is a semi-autonomous agency within the U.S. Department of Energy
responsible for enhancing national security through the military application of
nuclear science in the nation’s national security enterprise. NNSA maintains
and enhances the safety, security, reliability, and performance of the U.S.
nuclear weapons stockpile without nuclear testing; reduces the global danger
from weapons of mass destruction; provides the U.S. Navy with safe and
effective nuclear propulsion; and responds to nuclear and radiological
emergencies in the U.S. and abroad.