FIGURE FUK 3 Airborne activity observed in Seattle for radioactive isotopes of iodine, tellurium, and cesium in millibecquerels per cubic meter. As a reference, the average human body is exposed to 4,400 becquerels from the decay of potassium-40, a naturally occurring radioactive isotope of potassium. SOURCE: Reprinted from J. Diaz Leon, D.A. Jaffe, J. Kaspar, A. Knecht, M.L. Miller, R.G.H. Robertson, A.G. Schubert, 2011, Arrival time and magnitude of airborne fission products from the Fukushima, Japan, reactor incident as measured in Seattle, WA, USA, Journal of Environmental Radioactivity 102 (11): 032, Copyright 2011, with permission from Elsevier.

and that the decision makers would embrace the scientific process and have confidence in the information provided. In Japan, the success of the effort was endued by the fact that both civilian and military leaders requested that the technical experts remain in Japan as long as possible. Dr. Blumenthal communicated the results to a wide range of audiences, including to the general public on ABC News.1


1 Available at

The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement