TEPCO has announced their plan to remove the cover of unit 1 so that debris on the refueling floor can be cleaned off. This work will enable viewing of the spent fuel pool and the condition of the reactor well. The work has come under increased scrutiny after it was discovered that similar demolition work at unit 3 had caused contamination up to 50km from the plant due to the wind blowing radioactive building dust.
TEPCO’s plan for dismantling the mess on the refueling floor hopes to cut down on releases to the environment. They challenge may be that the releases from unit 3, even though they were considerable didn’t cause readings at the site boundary or nearby that caused anyone to take notice. Only an in plant reading near a bus stop caused an alarm, along with two contaminated workers.
The plan will involve first removing portions of the roof cover …
Source: Fukushima Sub