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A comment on Video of reactor 1 at Fukushima plant. Parent comment
That PDF has a schematic of the containment building on page 4. The "MARK-I" image corresponds to the Fukushima I-1 building.
http://i.imgur.com/Oj4kg.png
http://i.imgur.com/CckjP.jpg
from, respectively,
Madgi Ragheb, UIUC https://netfiles.uiuc.edu/mragheb/www/NPRE%20457%20CSE%20462...
NRC http://www.nrc.gov/reading-rm/basic-ref/teachers/03.pdf
That PDF has a schematic of the containment building on page 4. The "MARK-I" image corresponds to the Fukushima I-1 building.