#Fukushima I Nuke Plant Reactor 3: Steel Sheets on the Reactor Building Floor to Shield Radiation

After "Warrior" the vacuum robot swept up "sand and dust" on the floor (whatever it was) which TEPCO said was causing the high radiation in the area (right below the Spent Fuel Pool) and the radiation level didn't go down, TEPCO is laying down the steel sheets on the floor to help shield the radiation.

So the very high radiation is from the floor, and it measures over 100 millisieverts/hour 1 meter above the floor.

In June when the workers entered the Reactor 3's reactor building for the first time since the March 11 start of the accident at the plant, they were seen swiping the floor and collecting samples (see the video). The result of the sample analysis has never been disclosed.

TEPCO's press handout on July 4: