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Professor’s Diary: Fukushima radioactive material “has reached the west coast as of June 2013

ofessor’s Diary: Fukushima radioactive material “has reached the west coast as of June 2013 by ocean transport” — Health risks to be determined by ongoing monitoring

Published: January 10th, 2014 at 12:16 pm ET
By ENENews
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Jay T. Cullen, Associate Professor of marine chemistry at the University of Victoria, Daily Kos diary, Jan. 4, 2014: […] Fukushima derived Cs has reached the west coast as of June 2013 by ocean transport but [the] concentrations of Cs continue to be well below levels thought to pose environmental or public health threats. There have been a number of popular press articles that […] report the timing of the arrival of the radionuclides but offer no perspective on the actual levels and the associated risk to residents of the west coast (e.g. link). […] About 93% of radioactivity in seawater results from the presence of primordial, naturally occurring potassium-40 (K-40) and rubidium-87 (Rb-87). The remaining 7% are radioactive elements deposited to the ocean from past atmospheric nuclear testing. […] Fukushima derived Cs was detected all the way to the coast in June 2013 with the highest levels of Cs-137 farthest offshore (0.0009 Bq/L or roughly 0.006% of background radiation) and lower levels of 0.0003 Bq/L toward the coast […] Ongoing monitoring will constrain the likely environmental and health risks posed by ocean transport of Fukushima derived radionuclides.
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