Gov’t Expert: Fukushima caused gov’t 70,000-fold increase in Plutonium-241 in Japan — US Nuke Lab: Events such as Fukushima have resulted in plutonium contamination of large areas of oceans — Officials: Molten fuel is now ‘particle-like’ and contains ‘special nuclear materials’


[snip]
Taeko Shinonaga, head of Radioanalytical Laboratory at Helmholtz Zentrum Munchen (research institution founded jointly by Germany’s Federal Ministry of Education & Research and Bavaria’s Finance Ministry), scientists from Technische Universitat Munchen (Germany), Verhandlungen der Deutschen Physikalischen Gesellschaft 2013 meeting (emphasis added): Detection of long-lived plutonium isotopes in environmental samples by Accelerator Mass Spectrometry (AMS) —Plutonium isotopes 239Pu, 240Pu and 242Pu are anthropogenic radionuclides emitted into the environment by nuclear activities. Pu is accumulated in the human body and hence, poses a considerable hazard to human health. Due to the long half-lives, these isotopes arepresent in the biosphere on large time scales and a build-up can be expected. Therefore it is important to study the contamination pathway of Pu into the drinking water… a method to detect long-lived Pu isotopes by Accelerator Mass Spectrometry (AMS) is being developed. AMS requires only few milligrams of sample material… Consequently, more samples from different locations can be taken which is essential when searching for locally increased Pu concentrations as in the Pacific Ocean after the Fukushima accident… Samples from different locations in the Pacific Ocean and from the snow-hydrosphere are planned…
Taeko Shinonaga, head of Radioanalytical Laboratory at Helmholtz Zentrum Munchen, Nov 2014:  Comparison of activity between [nuclear bomb testing] fallout Pu particle and Fukushima origin Pu particle
Global Fallout Pu in Japan [GF]
  • Pu240: 1,360 Bq
  • Pu241645 Bq
  • Total: 208,005 Bq
Fukushima Pu found in our study
  • Pu240: 197,000 Bq [145 times GF]
  • Pu24143,700,000 Bq [67,752 times]
  • Total: 44,061,000 Bq [212 times]
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