The following photo shows a close shot of Fukushima #1 reactor post
explosion. It appears the crane may be located on the back side of
the area enclosed by beams. The horizontal tracks for the crane can
clearly be seen. But what is the stuff protruding up in the middle?
Again, the following provides a good cutaway view of the type of
reactors at Fukushima nuclear power plant.
http://www.world-nuclear-news.org/
RS_Battle_to_stabilise_earthquake_reactors_1203111.html
http://tinyurl.com/4f8y2we
If that drawing is correct for Fukushima #1, then it looks like the
reactor housing (or something) has been displaced upward about a few
meters into the space where the crane operates.
Best regards,
Horace Heffner
http://www.mtaonline.net/~hheffner/