Radiation Monitoring Data from Fukushima Area 04/18/2011
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On March 15, 33 experts from the Department’s National Nuclear Security Administration (NNSA) arrived in Japan along with more than 17,200 pounds of equipment. After initial deployments at U.S. consulates and military installations in Japan, these teams have utilized their unique skills, expertise and equipment to help assess, survey, monitor and sample areas for radiation. The 33 team members joined another six DOE personnel already in Japan.
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Radiation Monitoring Data from Fukushima Area 04/18/2011
- 1. Radiological Assessment - of effects from -Fukushima Daiichi Nuclear Power PlantApril 18, 2011
- 3. NNSA’s Consequence Management Response Teams have collected approximately 150,000 total field measurements taken by DOE, DoD, and Japanese monitoring assets
- 6. This dose estimate takes into account radioactive decay of the source material.
- 8. Dose conversion factor (DCF) computed for each flight to account for decay
- 9. Computed dose based on NRC-supplied radionuclide mix, consistent with results to date for nuclides that have been measured4 4
- 11. No measurable deposit of radiological material since March 19
- 12. US bases and facilities all measure dose rates below 32 microrem/hr (32 millionths of a REM) – a level with no known health risks
- 13. Agricultural monitoring and possible intervention will be required for several hundred square kilometers surrounding the site:
- 14. Soil and water samples are the only definitive method to determine agricultural countermeasures
- 15. Ground monitoring can give better fidelity to identify areas that require agricultural sampling5
- 17. An average transatlantic flight produces an exposure of 2.5 mRem*
- 18. A typical chest x-ray produces 10 mRem per image
- 19. EPA guidelines call for public health actions if exposure exceeds 1000 mRem over 4 days * Source: NRC: http://nrc.gov/images/about-nrc/radiation/factoid2-lrg.gif