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Radiological Assessment - of effects from -Fukushima Daiichi Nuclear Power PlantApril 7, 2011
Operations SummaryAerial Measuring Systems have totaled more than 262 flight hours in support of aerial monitoring operations
NNSA’s Consequence Management Response Teams have collected approximately 100,000 total field measurements taken by DOE, DoD, and Japanese monitoring assets
240 total air samples taken at US facilities throughout Japan undergoing lab analysis in the US Guide to InterpretationUS radiological assessments are composed of aerial and ground measurements and indicate radiation levels from material that has settled on the ground
Each measurement corresponds to the radiation a person receives in one hour at that location. AMS data is presented as exposure rate 1 meter from the ground at the time the measurements occurred
All measurements outside the Fukushima power plant site boundary are below 0.013 REM per hour – a low but not insignificant levelDOE/NNSA Monitoring
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6AssessmentAn assessment of measurements gathered through April 6 continues to show:Rapid decay of deposited radiological material indicating Radioiodine is the most significant component of dose
Radiation levels consistently below actionable levels for evacuation or relocation outside of 25 miles; and levels continue to decrease