TEPCO did another inspection of unit 1. They previously used a balloon that looked like a beach ball to float a camera up through the equipment shaft. That balloon was unable to go all the way up due to debris in the way. The new and improved balloon appears to be a promotional balloon shaped like a lightbulb complete with brass screw in base.
Besides the creative use of an advertising tool, the effort did manage to inspect all floors. The radiation readings were in the 20-150 mSv/h range.
Images of the refueling floor showed the refueling crane and also that the overhead crane had bent and fallen on top of the refueling crane. Workers took about a 3.81 mSv dose for their work.
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