Just-Published Study: Plutonium being found away from Fukushima is from nuclear fuel fragments blown out after explosions

Published: March 9th, 2012 at 12:01 am ET
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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
Emphasis Added

[...] 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
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