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Report: Nuclear material came off unused fuel assembly removed from Fukushima Unit 4 pool — Cobalt-60 at 1,400,000,000 Bq/kg — Debris “felt like grit” (PHOTOS)

Published: March 26th, 2013 at 9:30 pm ET
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March 7, 2013 Tepco document regarding testing of the fuel assemblies removed from the Unit 4 fuel pool with summary translation by Fukushima Diary:

According to Tepco, significantly high level of Co-60 was measured from the piece of debris taken from SFP4.

They measured 1,400,000,000 Bq/Kg of Co-60 [...]

It was taken when they washed the new fuel assembly [...]

Tepco states it felt like grit. Some parts were broken into sand, which couldn’t be collected. [...]

Full report here

See also: Gundersen on Gamma Rays: "Implies rubble was activated by neutrons, or that activation products like Cobalt-60 are in rubble -- Interesting"

Published: March 26th, 2013 at 9:30 pm ET
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7 comments

7 comments to Report: Nuclear material came off unused fuel assembly removed from Fukushima Unit 4 pool — Cobalt-60 at 1,400,000,000 Bq/kg — Debris “felt like grit” (PHOTOS)

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