Title: Isotopic evidence of plutonium release into the environment from the Fukushima DNPP accident
Author: Jian Zheng, Keiko Tagami, Yoshito Watanabe, Shigeo Uchida, Tatsuo Aono, Nobuyoshi Ishii, Satoshi Yoshida, Yoshihisa Kubota, Shoichi Fuma & Sadao Ihara
Date: 08 March 2012
[...] It was found that although the inventories of Pu isotopes in the reactors in the Fukushima DNPP were ca. 3.5 times those in the Chernobyl No. 4 reactor23, the percentages of core inventory released for both 239+240Pu and 241Pu were about 5 orders of magnitude lower than those of the Chernobyl accident. These results suggested that for the Fukushima DNPP accident, the plutonium emitted into the environment was mainly due to the release of Pu associated with fuel fragments as a consequence of the hydrogen explosions, as suggested by Kirchner et al [...]
Read the report here
Note the authors use the word ‘explosions’ — not ‘explosion’ — indicating the plutonium was released from multiple reactors and or spent fuel pools.
Regarding the other study to make a similar suggestion, Kirchner et al, this is what’s available online:
Jan 9, 2012 – This deviation from the mean core burn-up indicates that plutonium may be associated with fuel fragments that hypothetically could have been …
If anyone is able to find that excerpt please post below.
Published: March 9th, 2012 at 12:01 am ET
- Scientists: Plutonium released from Fukushima “is of radiological concern”; Reactor must be source, not spent fuel pool — Study: Plutonium found 120 km from plant; “Pu and non-natural uranium certainly increased in environment” April 21, 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
- L.A. Times: Speculation that “supercritical fission event” occurred at Fukushima reactor irradiating plutonium, says nuclear expert — Explosion so massive investigators found fuel rod fragments a mile away March 9, 2012
- Nature Study: Long-term plutonium dose assessment needed after Fukushima — Concerns about Americium-241 also — Deposition south of plant, not only northwest March 8, 2012
- Report: Nuclear fuel fragments found over a mile away were “ejected from the reactor cores in those explosions” not spent fuel pools, according to NRC (VIDEO) August 18, 2011