Observations of Fallout from the Fukushima Reactor Accident in San Francisco Bay Area Rainwater
Eric B. Norman, Christopher T. Angell, Perry A. Chodash
TL;DR
This study detected Fukushima-derived radioactive isotopes in San Francisco Bay Area rainwater, confirming fallout presence with low activity levels that are safe for the public.
Contribution
First direct measurement of Fukushima fallout isotopes in rainwater in the San Francisco Bay Area, demonstrating the geographic spread of radioactive fallout.
Findings
Detection of Fukushima isotopes in rainwater samples
Measured activity levels are very low
No health risk to the public
Abstract
We have observed fallout from the recent Fukushima Dai-ichi reactor accident in samples of rainwater collected in the San Francisco Bay area. Gamma ray spectra measured from these samples show clear evidence of fission products - 131,132I, 132Te, and 134,137Cs. The activity levels we have measured for these isotopes are very low and pose no health risk to the public.
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Taxonomy
TopicsRadioactive contamination and transfer · Nuclear and radioactivity studies · Graphite, nuclear technology, radiation studies