Environmental Science & Technology (ACS Publications), Apr. 1, 2014: Airborne Plutonium and Non-Natural Uranium from the Fukushima DNPP Found at 120 km Distance a Few Days after Reactor Hydrogen Explosions — Plutonium (Pu) and non-natural uranium (U) originating from the Fukushima Daiichi Nuclear Power Plant (FDNPP) were identified in the atmosphere at 120 km distance from the FDNPP [...] Comparing the time series of analytical data on Pu and U obtained in this study with previously reported data on Pu, U, and radioactive Cs, we concluded that Pu and non-natural U from the FDNPP were transported in the atmosphere directly over a 120 km distance by aerosol and wind within a few days after the reactor hydrogen explosions. Effective dose of Pu were calculated using the data of Pu: (130 ± 21) nBq/m3, obtained in this study. We found that the airborne Pu contributes only negligibly to the total dose at the time of the incident. However the analytical results show that the amount of Pu and non-natural U certainly increased in the environment after the incident.
Actinide Emissions from Nuclear Accidents: Recent and Coming Developments (pdf), Georg Steinhauser & Brett Rosenberg, Department of Environmental and Radiological Health Sciences, Colorado State University, 2014: The Fukushima nuclear accident will remain in public memory as one of the worst environmental disaster in recent years. [...] plutonium and other transuranium elements have been emitted in smaller amounts and still remain the most understudied contaminants. [...] we were able to detect trace amounts of reactor-derived plutonium in two vegetation samples from the vicinity (0.5 and 16 km distance) of the Fukushima Daiichi NPP. The characteristic 240Pu/239Pu atomic ratio [...] proved that a nuclear reactor must have been the source of these contaminations. [...] our results indicate a particulate release of plutonium which is of radiological concern upon incorporation.
Published: April 21st, 2014 at 1:59 pm ET
- NPR: Scientists test for Fukushima plutonium being transported in Pacific — Study: Plutonium particles found to have “high environmental mobility” — Expert: Fuel materials may be flowing from plant, “What is actually contained in releases?” (AUDIO) February 12, 2014
- Study: Plutonium from Fukushima went further than Chernobyl — Researchers ‘surprised’ their most plutonium-contaminated sample was from site farthest from Fukushima plant — Concern material is flowing into Pacific Ocean from land August 4, 2014
- New Studies on Mystery ‘Black Substances’ Released: Fuel core materials from Fukushima plant detected — Plutonium, Uranium-236, Curium discharged into environment likely in form of fine particles (PHOTO) March 7, 2014
- Study: Fukushima plutonium in playground 60 km from nuclear plant — “Proves that indeed Plutonium has been emitted by the accident” — Some “in the form of fuel fragments”? — Up to 14 Billion Bq of Pu-239 and-240 released (MAP) June 29, 2014
- Expert: Billions of pieces Fukushima nuclear fuel have spread pretty much everywhere — “It’s truly frightening… wherever there’s cesium, there’s plutonium” — Atomic bomb had one pound of uranium… Fukushima had hundreds of tons — TV: “Abundant quantities” of plutonium are being found (VIDEO) May 19, 2016